Malicious PDF — malware analysis report

Static analysis result for SHA-256 80917c8d9b11bd1d…

MALICIOUS

PDF

70.1 KB Created: 2021-05-12 10:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eedcfa48eb35eca8765368a0a3cf25d2 SHA-1: c98fa467effba5b3d443397883f2c346d3149e63 SHA-256: 80917c8d9b11bd1dbbc91c9695f2547cadbe8c3bc1e934ec3d4dc84e22a9bf66
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=gimp+suit+stag+ideas PDF link annotation
    • http://bestunew.xyz/navy_seals_logo_wallpaper2t66e.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/78273556903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_601197eea7c06.pdfIn PDF document text
    • http://qrettalq.online/1308959727657sis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488817/normal_603b3ef92e5dd.pdfIn PDF document text
    • https://motubisirewu.weebly.com/uploads/1/3/4/5/134529252/xuwelufaranaz.pdfIn PDF document text
    • https://jurutidi.weebly.com/uploads/1/3/5/3/135397820/jopovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454430/normal_606c85f803d92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487005/normal_5febbb4799ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_600b23af16bac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_601080ef704b0.pdfIn PDF document text
    • http://trysoda.pro/379908716615pfha.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/pesuwizarikafokiwevonala.pdfIn PDF document text
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/588373e7.pdfIn PDF document text
    • http://oficialshoes.site/lebezinexiluzafepowuw0w32s.pdfIn PDF document text
    • https://fukukajapojuj.weebly.com/uploads/1/3/2/8/132815924/7972999.pdfIn PDF document text
    • https://tugojomabam.weebly.com/uploads/1/3/4/5/134588125/7248110.pdfIn PDF document text
    • http://salebox.shop/91350084051dhmea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463287/normal_5ffab178ba87f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_a6b991277f034b039d8da9a9915935b2.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_9136fbb6963543a7baf0448e69104c88.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_56c5c28b87834a958a5866f5f5760780.pdf?index=trueIn PDF document text
    • http://raxegujanamefas.atwebpages.com/chhattisgarh_map_blank.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_off0000d540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD540 5184 bytes
SHA-256: f56b486adbec5ac7c9d52816a81b505442dce8be0708e9fb519c08ec540c2099
font_01_sfnt_off0000e6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D5 10976 bytes
SHA-256: a9d6ce2dbdd536f244ffdff54e5849dd7c86b5cf93ada6c674a73a2d4ddb5cd3

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