Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e2724a38612213…

MALICIOUS

PDF

72.1 KB Created: 2020-12-17 16:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2f59f21756fee330faf3a9228a3e4b57 SHA-1: db00db8d79e42e563ddc5180c1d337adcb01d4f6 SHA-256: b7e2724a386122135b8b58b0458408bcd26d2a1e2060540f91b5b0c88c143ce1
186 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 0.9997

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://trafftec.ru/strik?utm_term=uei+dl379+manual PDF link annotation
    • https://xaniwunedevivat.weebly.com/uploads/1/3/4/4/134470123/werez.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/2dd035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_5f96dce7a37fb.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/8659590.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_5fcc0765ea21e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452862/normal_5fa89236cfadc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5fd7efc7b7c33.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/sixudibajoxasiw.pdfIn PDF document text
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/linewotimat.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/5fbce344be7cfc36344e8aaf/t/5fbe7bc0cb3e0f577122e728/1606319064115/mematovofemasaduzekexal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fcd8fac9aa2de0c64acf4ba/1607307180588/acrylic_nails_near_me_book_online.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF66 4780 bytes
SHA-256: 3d00af62182a64b29c6dfa6e14499a35d322ff28be095d72f32895c3dc42699e
font_01_sfnt_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 10752 bytes
SHA-256: 846a960e580ec6d9594bc181f8b906f788306ab9872c0556d27978d5e98a480a
font_02_sfnt_off00010470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10470 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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