Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f9a1200500df9e…

MALICIOUS

PDF

84.8 KB Created: 2021-09-17 02:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cc7f7347c568c23273cce21cc4899b41 SHA-1: afefbd438a2187e586a97654e57d6ce477f9b879 SHA-256: 70f9a1200500df9e971e2204b3dc204f2a08624aec69e031a86ca515e8027302
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to external sites, some hosted on compromised CMS platforms, and includes instructions to disable security software and download a password-protected archive. This suggests a phishing or social engineering attack aimed at delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=how+to+break+pattern+lock+on+android+phones PDF link annotation
    • https://senfina.top/uploads/files/62470854835.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327da716322---53601452206.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/39878304976.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210914015642.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/wibabub.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/4d967a86bdd58f5a514b96f02c3bfb7b/buxaxagil.pdfIn PDF document text
    • http://timebymtm.com/upload/files/17283851540.pdfIn PDF document text
    • http://gekon.net/userfiles/file/74476902380.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131bdadee29e---28736135281.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/1905745392.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3aae4731e---jowen.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/77261266595.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/taxobivofof.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/xigogabar.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161408fb8d6857---94463119335.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/6b73a0b125edcd1a8da1bd84d936f0ba/4506716820.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/38478164996.pdfIn PDF document text
    • http://xenangheli.vn/public/files/94712574069.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/koguzowige.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/mudofol.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/nobowususapogadepafuxipi.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/wafarekirebi.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/divugokenoduvobore.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_off0000e551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE551 18084 bytes
SHA-256: 138a2afdcd00a396b39d372bf5ee9c847c796503f0f2c4e01be56ef7a944d6c3
font_01_sfnt_off0001145d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 10920 bytes
SHA-256: e2c1b7463f7d00ac7b1d1228d3164b5992c3250ec01217d85dfe2975fdbbcdfa

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