Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a42d54d1697349…

MALICIOUS

PDF

66.1 KB Created: 2021-03-02 15:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5e18de3f309f91eb7744d2812e2a83eb SHA-1: 149020204ed9920832d499d1a16b941a1378cf4d SHA-256: a2a42d54d1697349d31277abb47d5c63d726e1a4934b27c604625059dac5e000
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one that mimics a search result for a common query, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports that this document is part of a network of disposable sites designed to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://xezojetit.ru/award?keyword=how+much+does+it+cost+to+install+a+gas+heating+system PDF link annotation
    • https://laxigotugib.weebly.com/uploads/1/3/0/9/130969680/3017420.pdfIn PDF document text
    • https://cdn.sqhk.co/buwaxaxodi/h7GHPge/drift_boss_y8.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/jificje/popug.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/lw6hcrk/72164757569.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/dvG0Xgc/47871092506.pdfIn PDF document text
    • http://pewusimirunoto.22web.org/samsung_remote_wont_work_with_sonos.pdfIn PDF document text
    • http://kojewotezigu.iblogger.org/miller_syncrowave_250_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sirirowevaga.rf.gd/34308738227.pdfIn PDF document text
    • http://wikotutagor.epizy.com/garmin_gps_etrex_10_price_in_india.pdfIn PDF document text
    • http://jewofeket.onlinewebshop.net/larry_david_net_worth_2018.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/10330267955.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/domibibumepujoral.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/descargar_album_completo_de_ana_gabriel_gratis.pdfIn PDF document text
    • http://paxubar.rf.gd/fundsmith_equity_fund_factsheet.pdfIn PDF document text
    • http://pikusotanuw.rf.gd/bowolumazakoxevasa.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_off0000c646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC646 5412 bytes
SHA-256: 38aeeedbb5503a8e408c8013f59d329b2fb7ee245996c12718e36007f04b3406
font_01_sfnt_off0000d8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A2 10148 bytes
SHA-256: 59bdc22c5c08110879e2fe287acb47d33c30953e8ee380c433c624ef1fde4145

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