Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe7b76affa883f2…

MALICIOUS

PDF

83.3 KB Created: 2021-03-24 04:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d82242088dd2c863a24db25f3676d166 SHA-1: d3a60cb8f4a6e3cd24d74a08c47719366247df52 SHA-256: 6fe7b76affa883f22f1f08a210b656ee211b7ed397c89489f356949277aeca73
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or scam attempt. It contains a mass of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of invoice and callback lures further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://fokemale.ru/award?keyword=odisha+govt+treasury+challan+form+pdf PDF link annotation
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/rosifixugipigunu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_5ffcf0835daf4.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/1433921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_60418d3a32897.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387410/normal_5ff6bdb7a5bc9.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/litekejukibebijuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/EigeK3v/75602464372.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/2ecd6a94255b93.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/jejbvoe/rokikarilagifefaperifisig.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/JlidULa/35721770562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_600e555160ab8.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/ieDgggi/zombie_day6_lyrics_english_version.pdfIn PDF document text
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/defikegimodedanuj.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/demaw-mupewitogimijuv.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/hghGanN/vubekifesadurazara.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490519/normal_60097d2416d91.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/6828611.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_e0a7782de0664dc7b4d3e1dd37c317e9.pdf?index=trueIn PDF document text
    • https://1a899ca6-11bf-4464-971e-4bf0b885e765.filesusr.com/ugd/4ac3ff_54465e1a986a4ce2a23a23cc4d61f2cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mizeteb/nozasa.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/44818314724.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_f04b4ea90e894230b29b460565f02a3c.pdf?index=trueIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_f56ae454263649e19c3cccd5a88a736c.pdf?index=trueIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_1b3f6fe15f1b4d34b33cd26f43f29605.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/mamavogisiluzujolep.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10553 5756 bytes
SHA-256: 0ecffa10fc5a3321d85deb918e89c0f287ce1697879a1281645442a251a7ed98
font_01_sfnt_off000118d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D3 10936 bytes
SHA-256: fb25cc9af28ae16242ed338cb673bdb462a2e29ac17e9d420e48d17e34a86e5b