Malicious PDF — malware analysis report

Static analysis result for SHA-256 72eab7d4a2044348…

MALICIOUS

PDF

65.5 KB Created: 2020-11-24 18:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6a004572eb0567ca33feab5dd6ae55dd SHA-1: 16c986c3b7551396d3888e263de9fb759fa84e06 SHA-256: 72eab7d4a20443484bfe83eaf6c6ba28cc709a976319c591cab374bd239eee1f
66 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 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 4

  • 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://traffset.ru/aws?utm_term=jailor+warder+key+answer PDF link annotation
    • https://fozumazajafipal.weebly.com/uploads/1/3/4/5/134588547/korinitemenelaf-waraximuxal-divufepesewi-jovex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5f94015f5894d.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/4fe8e2.pdfIn PDF document text
    • https://velabusodogir.weebly.com/uploads/1/3/1/8/131858366/2448350.pdfIn PDF document text
    • https://nabumeludofava.weebly.com/uploads/1/3/4/3/134373896/7131198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5fa07038a04c9.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/fuvitagasebap-tigelamab-lozurasumosoxig-wiwozuvasowov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450241/normal_5fa190f3cdc2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f91f5501a97f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468871/normal_5faf0c41e12f5.pdfIn PDF document text
    • https://kisigitoteke.weebly.com/uploads/1/3/3/9/133997396/8898171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/23992971162.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/zofabudorolasaxawezewe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC430 5068 bytes
SHA-256: ed0d68802f3536fb11b42ea0a633cbd36ddca6f1df99545d9a2e6bc8218c20cf
font_01_sfnt_off0000d597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD597 10576 bytes
SHA-256: 7db5a1818b577e0492958714c0717e0c10c264ec40615c3b1bb9c27800b8cb2a

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