Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9ddc16a060e1fd…

MALICIOUS

PDF

73.9 KB Created: 2021-06-09 05:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a2c4c9a8e24170328173adb6f58b345 SHA-1: ce480787b4dbc75339a507cf5897e41c5155e597 SHA-256: db9ddc16a060e1fde20842bcceaccd846e52c0c9f36b2a4119aa08f87ecdd034
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 0.9996

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://huntic.ru/pbw?utm_term=gta+5+what+stock+to+buy+after+lifeinvader+mission PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488815/normal_605655da5873f.pdfIn PDF document text
    • https://wiwupaluw.weebly.com/uploads/1/3/1/6/131606778/vidugukefuwevil_tijatubojo_xubikefoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_5fdc379d4bd62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_6069eaec32164.pdfIn PDF document text
    • https://supadebev.weebly.com/uploads/1/3/2/7/132712355/057d7e4503.pdfIn PDF document text
    • https://dugajivesunilo.weebly.com/uploads/1/3/4/8/134866737/3595435.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/82e334.pdfIn PDF document text
    • https://lorukadewe.weebly.com/uploads/1/3/4/3/134348028/bc5dd2df976b313.pdfIn PDF document text
    • https://duxegolukazokun.weebly.com/uploads/1/3/1/3/131398215/116451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457582/normal_5ffa089ac26c3.pdfIn PDF document text
    • https://lotogifivetizub.weebly.com/uploads/1/3/4/3/134309957/fapago.pdfIn PDF document text
    • https://koledino.weebly.com/uploads/1/3/4/3/134332835/kuxana-mopazof-befujesuja.pdfIn PDF document text
    • https://dikafusit.weebly.com/uploads/1/3/5/3/135304370/faloxi-gofipu-xadagagupuretu-totesofux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401692/normal_5ff794b86f8b9.pdfIn PDF document text
    • https://divigutokorafo.weebly.com/uploads/1/3/4/6/134683056/3396094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_6023e393a1163.pdfIn PDF document text
    • https://sozejaras.weebly.com/uploads/1/3/2/6/132695734/8417078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_5fd8afb33d260.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pinurakus.pbworks.com/f/vowid.pdfIn PDF document text
    • http://kunixove.pbworks.com/w/file/fetch/144485682/jofumuzoxejavo.pdfIn PDF document text
    • http://gaguwufajij.pbworks.com/f/fupesitixogitekazalaj.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/f/example_of_exchange_transaction_and_relationship.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_off0000e0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DE 5872 bytes
SHA-256: b8f836ee1e849cf1615efd9e2b5b9246af8dfdaf885cce6e09bd45fd5f2a19a8
font_01_sfnt_off0000f4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E0 10892 bytes
SHA-256: 70865fa58e344035760302d14fd5d331a5f49d240ceea2f40a1da3dbfc34686a

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