Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f9cd1e5862f55c…

MALICIOUS

PDF

160.5 KB Created: 2021-08-13 00:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: b3404e0910f1b9baa8d120910eee554e SHA-1: 0a11be194d406ee842eda974dda6a67ab8079466 SHA-256: d0f9cd1e5862f55cbbd75684deeab926cf533409eaf793c3f5164d8d3daf31dc
276 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document impersonates Office 365 to trick users into downloading a malicious file, as indicated by the 'SE_BRAND_CREDENTIAL_PHISH' and 'SE_ENABLE_LURE' heuristics. The numerous embedded URLs point to compromised WordPress sites, suggesting a link farm used for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://wastran.ru/uplcv?utm_term=office+365+trial+download+filehippo.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=office+365+trial+download+filehippo PDF link annotation
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/a07db03df1986f83851102be5a141166/51328718286.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/wasetotawonimomokube.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b715ac311---wiwozezamabofizopu.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/53742276963.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676415eb8c---85957374813.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/13396058462.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/60fb2dcff7f595c8cdd4b8475ed080e8/95564890052.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/59949510860.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/suvemudomagowi.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b6cfbb209---30164374227.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/kitudodunaromadukurubupen.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/877feda7789715ae74382ffca7be0b4a/kanemuguno.pdfIn PDF document text
    • http://chinazzjx.com/d/files/82691460573.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078408c14e8d---dubelavawisevuporaz.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a52cce0e4d7---37072426723.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/28155437961.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/14e0765ee08dfaa0c7a634e7633664bc/42411224107.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/13498600275.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/70811460089.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/37038401696.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/01554cd1d4652d2e8163812cd3116cc3/90742645919.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/varer.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16088ea1aecc63---28723149369.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2118E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000229a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x229A5 11136 bytes
SHA-256: cc48e58826ab6962e4f099228f351a4346759f1747bec46a70f0d0d37921edb0
font_02_sfnt_off000243a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243A7 17660 bytes
SHA-256: 0dccfe19ab4791239c1e6126ebeb324b8302337b01b8739c77b69918bd54c49e

Open this report in the interactive analyzer, or submit your own file for analysis.