Malicious PDF — malware analysis report

Static analysis result for SHA-256 d321d60c6a4d011b…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 07:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f235309e6b8d9654a3da87c807e3b78b SHA-1: c0645ca19bd624562c7f95be0afcaf318830ae4f SHA-256: d321d60c6a4d011b44dbc4452b28fbc12865d6ecf478ac0e8f2e98add7534141
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence ML classification and ClamAV detection indicating maliciousness. It impersonates Netflix, a common tactic for credential phishing, and includes multiple links to external sites, one of which is hosted on a compromised WordPress upload directory. The embedded URLs and link farm heuristics suggest an attempt to redirect users to malicious sites for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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://garglob.ru/uplcv?utm_term=online+movie+one+free.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=online+movie+one+free PDF link annotation
    • http://studio-orlandini.com/userfiles/files/51908644978.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109121053449918.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613d28c851279---60117359062.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/runusofuvubisoju.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/xepifusorazepasozovosiber.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/92435040443.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/redolopopuvos.pdfIn PDF document text
    • http://fjsxsx558.com/upload/files/34450653131.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a3614f9da---xuxinil.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/zinisijavakabiwexitazumo.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/67543e7513a90c72e078cbbf1a88dd30/63168115326.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/39517745484.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/23519600999.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/kugubenonobedem.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/dupapive.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5639aa86f---46505627753.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/gexiluwubujujefonuvival.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/68885598306.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/a2212020c88f21177596fa8614a277a9/zusugof.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/55518067011.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/89777324646.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210903130617.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/non46us7aknb4v34pt664a0cp2/zovudasuxawesir.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/109d7dfca74ddb13b3dcaaefdc0ffe44/89794333384.pdfIn PDF document text
    • http://semanbio.com/upload/files/25110452582.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_off0000d682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD682 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 10040 bytes
SHA-256: 6f55a2f7bc369ce5b4471d48ad29c231ea040e43d6449bffdbd973c6760b30d5
font_02_sfnt_off000104d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D0 18364 bytes
SHA-256: d3d9406c666375454cf26fb507bdf69b5d86ec5297a21c451c1e6792272a029e