Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d6b709492c1582…

MALICIOUS

PDF

93.2 KB Created: 2020-11-23 23:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8a134fb7d4ef2add5830f7ae032054c9 SHA-1: 967ed55deb3a4f08a7a1959e383c61fd5ffc2358 SHA-256: 62d6b709492c15822bd5fea7fe9f9a7c580ecde049bae01187e774153c808f79
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 0.9995

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://trafffe.ru/123?utm_term=who%2527s+afraid+of+virginia+woolf+play+meaning PDF link annotation
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/dce165493735b43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_5fb8b04540d18.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/f1b0e925174c3.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/dusutogebu_pajijiludeluwi.pdfIn PDF document text
    • https://sabopedawexidix.weebly.com/uploads/1/3/4/3/134305122/bofirezuxuwux.pdfIn PDF document text
    • https://zubumipe.weebly.com/uploads/1/3/4/7/134715483/sogupas.pdfIn PDF document text
    • https://vutibije.weebly.com/uploads/1/3/4/6/134672754/8231113.pdfIn PDF document text
    • https://jagamasukibo.weebly.com/uploads/1/3/4/4/134493784/tewuw_kakezu_sejidazif.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/9212097.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/tojiripeluzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/5204d32d-b0ac-4fd5-8d89-96c19468dea2/26237102504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cd500a-c4e9-400e-a5ba-e1b60dac88f3/7022013206.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001120a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120A 3120 bytes
SHA-256: 1ad02b79c7091a558633aca35b79c18c4801c8f97407e2d39b41a6bac3159f63
font_01_sfnt_off00011d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3D 5756 bytes
SHA-256: 0c7210908343e8580145d84e254047e302091956293f909909c70cfb149f4223
font_02_sfnt_off000130df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DF 11380 bytes
SHA-256: c6a9f21f93bac7c33d99eb2e0c16ebff2fc9939efb4ffc675c64f30d860f834f
font_03_sfnt_off0001552d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1552D 4836 bytes
SHA-256: f6d7e4ca8943d3fa5e29ee890cd6e88acd5e8b32fb7c84b28b057f523603ffe1

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