Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d0d87b0f030b8e…

MALICIOUS

PDF

77.1 KB Created: 2021-06-10 04:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 030cad1f431b1fe18e5a3507aa3d9ac8 SHA-1: 57d16e085cd05751a186bc646d31fc208608221f SHA-256: f9d0d87b0f030b8eb0ba2c8a3f4993c6e127f13f400a8cb6064c8ad4d14359ac
246 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document functions as a link farm, containing numerous external links to disposable domains. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' indicates a brand impersonation for credential phishing, and the presence of a 'Pubg hack no recoil' lure suggests a social engineering tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical 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: action link to abused redirector https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/bba9ed.pdf.
  • 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://drafthe.ru/pbw?utm_term=pubg+hack+no+recoil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390056/normal_603eaefc0cb67.pdfIn PDF document text
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/bba9ed.pdfIn PDF document text
    • https://kadenuwu.weebly.com/uploads/1/3/4/6/134674874/dotajikud_nipoboro_bexuzajip_xajok.pdfIn PDF document text
    • https://duzufekiwavana.weebly.com/uploads/1/3/4/6/134609718/2364162.pdfIn PDF document text
    • https://pegutezupo.weebly.com/uploads/1/3/2/7/132740329/3991213.pdfIn PDF document text
    • https://nuxowisa.weebly.com/uploads/1/3/4/0/134018218/811708.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/1075465.pdfIn PDF document text
    • https://padabomax.weebly.com/uploads/1/3/4/6/134681696/383e5ed.pdfIn PDF document text
    • https://fabidarupevonu.weebly.com/uploads/1/3/4/6/134620419/8614834.pdfIn PDF document text
    • https://tewosafaxuw.weebly.com/uploads/1/3/1/3/131379700/jazusibumileva.pdfIn PDF document text
    • https://kibidabusiben.weebly.com/uploads/1/3/1/0/131070702/e5bc280.pdfIn PDF document text
    • https://porijupipisezug.weebly.com/uploads/1/3/4/7/134718457/6568044.pdfIn PDF document text
    • https://mufobaxepomek.weebly.com/uploads/1/3/4/8/134866816/gujufulimab.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/d921fa666d.pdfIn PDF document text
    • https://farunekigevizaj.weebly.com/uploads/1/3/5/9/135976182/25398a86.pdfIn PDF document text
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/zogetudolesubar_sezifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410703/normal_606e615894aee.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/wodoko_vanigafisivemom_veruxorusub.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
    • http://bomasasawavi.pbworks.com/f/how_do_you_find_upper_and_lower_bounds.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/w/file/fetch/144516153/acm_icpc_problem_2020.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/w/file/fetch/144518784/how_to_schedule_bulk_trash_pickup.pdfIn PDF document text
    • http://polubisoxuwo.pbworks.com/w/file/fetch/144492960/37133880718.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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 4892 bytes
SHA-256: 8e088874b610b660af4c8c4becc0a84f809ce3a2634ddaea847c1166e1f65d93
font_01_sfnt_off0000f689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 10084 bytes
SHA-256: a6b84d58dbdfbb9016d228e972d9eccfb4c5fd52d80c48ffef9ac4e721bb84ca
font_02_sfnt_off00011908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11908 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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