Malicious PDF — malware analysis report

Static analysis result for SHA-256 9faee1e6f2c1f4d6…

MALICIOUS

PDF

73.7 KB Created: 2020-12-21 17:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 628f876484e0158ee7216bb747ec31bf SHA-1: ba4cfb454268cfb6a55c44f994bcf913a4393549 SHA-256: 9faee1e6f2c1f4d6b135aa751e6f7a224c2f5915c6fb05b6287cb9406abf3f83
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://trafficel.ru/strik?utm_term=magic+poser+app+store, which is likely used to redirect users to a malicious site. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://trafficel.ru/strik?utm_term=magic+poser+app+store PDF link annotation
    • https://rovivivaju.weebly.com/uploads/1/3/4/3/134313680/vamoxo.pdfIn PDF document text
    • https://regogugone.weebly.com/uploads/1/3/4/8/134891767/1855955323.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/wajibe-wixud.pdfIn PDF document text
    • https://vujofuda.weebly.com/uploads/1/3/4/3/134375628/tedanibusamumusida.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/talatizifesowiz.pdfIn PDF document text
    • https://tijogarukaro.weebly.com/uploads/1/3/4/7/134710746/wigupe.pdfIn PDF document text
    • https://womukowewefe.weebly.com/uploads/1/3/4/8/134889771/8164836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5faf65bd4361c.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://static1.squarespace.com/static/5fc14c376609fd0ee7940dbf/t/5fc4a6411972c46e3c30fc00/1606723137202/zoziwujorabukesoxabenodu.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_off0000d7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B5 4756 bytes
SHA-256: ef120b5cfeea7c7eecc193bbc87a844af11c163ef9dbfa2eb9b166df29ad92a3
font_01_sfnt_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 10608 bytes
SHA-256: 5ebba12fe7be1040b612645b74584bee2b24b8ea913e5bca1b0fe28f1e683717
font_02_sfnt_off00010c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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