Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62c2adddfa98974…

MALICIOUS

PDF

97.4 KB Created: 2021-01-19 16:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fc8656cc267647a41164e30d6522a7db SHA-1: ca460b598f0d85cb8ccf06fe5ff6bcc709247ca7 SHA-256: d62c2adddfa9897458e607e9484bb34dd7956d5f4311979320b237520b7533cb
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and ML classification. It impersonates a document signing service and contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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://maypoin.ru/aws?utm_term=adobe+acrobat+standard+2017++version PDF link annotation
    • https://site-1180237.mozfiles.com/files/1180237/lesenamugetoluro.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/DD1UihK/battlelands_royale_online_spielen.pdfIn PDF document text
    • https://site-1167942.mozfiles.com/files/1167942/96105097531.pdfIn PDF document text
    • https://cdn.sqhk.co/penomufepuk/hhjjssk/rebapoku.pdfIn PDF document text
    • https://cdn.sqhk.co/jazepoxamib/ifo0WEP/76727258244.pdfIn PDF document text
    • https://site-1171608.mozfiles.com/files/1171608/video_apple_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/jifgeid/dozoper.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/dRFggij/truck_driver_3d_offroad_game_download_uptodown.pdfIn PDF document text
    • https://site-1168114.mozfiles.com/files/1168114/mitemolinuxonup.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/gf1acE8/clumsy_cat_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/4rujahf/40204818753.pdfIn PDF document text
    • https://site-1224402.mozfiles.com/files/1224402/download_a_tag_knight_mod_apk_unlimited_money.pdfIn PDF document text
    • https://site-1178227.mozfiles.com/files/1178227/debukelosoxem.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/figonapu_fobitu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/tekusip.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/59214897321.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/foten.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/a4_lever_arch_file_spine_label_template.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EA 5284 bytes
SHA-256: 980b43aed6da840b5434b044f9f607146164000fe72c6bd018a42fe61212c94d
font_01_sfnt_off000142fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FB 11348 bytes
SHA-256: 69fe88c792b99ebf8b643bed48ad3b684b70fc466cda870a58173bfce38b51d8
font_02_sfnt_off000169d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169D4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3