Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bf2e6dd430205a…

MALICIOUS

PDF

90.7 KB Created: 2021-03-29 20:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0d18731d74090fdf9b0766492bbfc63d SHA-1: bfb333ddd6ea2d09f27c03d6cb6d8aead963d40e SHA-256: 80bf2e6dd430205ad77bdb4dd9acd70a054f419cec7acefc33ee8367888e1fb5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous external links, many hosted on disposable domains, suggesting a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/award?keyword=royaume+betsileo+pdf PDF link annotation
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/gedaj-wudolulu.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/nudobep_xajaxufarilodod_xusuzox_revexigot.pdfIn PDF document text
    • https://dimutaribosisup.weebly.com/uploads/1/3/4/4/134444719/8519557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475988/normal_60103dcf2e7b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_602002e837b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_60604b0bb70b0.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/diwuf-popikepokito-fibix-folinukazezaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5fe993cfa2679.pdfIn PDF document text
    • https://rinavufapakoto.weebly.com/uploads/1/3/4/4/134460237/ae0a3f0ce3b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_60421f6f52bb0.pdfIn PDF document text
    • https://gejeximiba.weebly.com/uploads/1/3/4/8/134897602/4296996.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://uploads.strikinglycdn.com/files/492aa871-ca58-42ef-94a2-47f95aeaff85/download_tajweed_quran_online.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/89234206895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc451f4-9716-41d6-bcab-7c1337ad7e15/sennheiser_rs_175_rf_wireless_headphone_system_price.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/is_cbr2f2_polar_or_non-polar._explain.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/normas_de_auditoria_independente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7ae7d7-7667-433d-b678-846151238068/99193650455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086d3300-6bbf-4c1a-8b5e-87db2427c33b/what_does_intersession_mean_in_high_school.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_off0001153b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153B 5116 bytes
SHA-256: d5fa3cf30fcb9128243b1db40562e7a4689d64bc9b51ae0c40836f36bf6c1985
font_01_sfnt_off000126b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B4 13180 bytes
SHA-256: 188bed990313459b0cc7270652932cb623e9cfec2fedead6af6a6d19edea16cc
font_02_sfnt_off0001505a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1505A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176