Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e6de5de8acdd97…

MALICIOUS

PDF

71.0 KB Created: 2020-12-04 03:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 90f7519ea286e30c3a1ffdbe0e842384 SHA-1: 9de45d81996e1e27c4079893225cecacac4f5f68 SHA-256: 08e6de5de8acdd974446ea14775b32f3a415c36b1cd1c8e28c65182cc20a1e9c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/strik?utm_term=gta+v+serial+keygen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f9e426335f32.pdfIn PDF document text
    • https://nibuxapevu.weebly.com/uploads/1/3/4/6/134601724/jamobaripuka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374984/normal_5fc960be28251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5fb745129a72f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393204/normal_5fc988d06ecca.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/wupumatadobitaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5f8ead69c754e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413125/normal_5fc7f01594b37.pdfIn PDF document text
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/2281018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501991/normal_5fc8ea911a00c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f8f490a2c510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5f9883e240abf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_5f9262109bcb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458407/normal_5fbed6a27ea5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5fa102105c77a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf51c108845d09248116b1/1606373829574/76911997585.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5aa7fd26ff1194f946b85/t/5fc6d6350623334b0c4dc7f3/1606866486067/fonibimerukobomal.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_off0000d801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD801 5112 bytes
SHA-256: 0ca4a7149c5cfeeffc7284c046a15842ba5a8c50416dd219f9ff7ad95a88a525
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 11076 bytes
SHA-256: 5db2e27df58a7dc325a730257bcf43dc1ab791ca2455a900e9135694716d94fa

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