Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba08f46abb87560…

MALICIOUS

PDF

77.1 KB Created: 2021-03-17 21:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c7661c961453af1ad23abb13d04e7b6f SHA-1: 8283915bf2703164de6263517f81d0a348b690d8 SHA-256: 2ba08f46abb87560c41ba6eb9f1fdea4981e8aec678ea1c9e3e51e8da5df5e32
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a large number of embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the primary attack vector appears to be directing users to external malicious sites.

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/wix?keyword=chapter+15+darwin%2527s+theory+of+evolution+concept+map+answer+key PDF link annotation
    • https://rolugoxeve.weebly.com/uploads/1/3/1/3/131380951/dixewebapigivu.pdfIn PDF document text
    • http://usejus.club/surah_yaseen_full_hd_picbee6q.pdfIn PDF document text
    • http://lawusuzad.iblogger.org/duraphat_varnish_safety_data_sheet.pdfIn PDF document text
    • http://instahelpforbusiness.com/videfalebedoseb8lq6a.pdfIn PDF document text
    • http://tivewuba.iblogger.org/susagabupunugolezotelad.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/dWghWhd/negusenonetijiri.pdfIn PDF document text
    • https://petodudugagakot.weebly.com/uploads/1/3/4/6/134640630/2543968.pdfIn PDF document text
    • https://cdn.sqhk.co/dojaxeje/hiulghK/download_bike_unchained_2_mod_apk_android_1.pdfIn PDF document text
    • https://baliwiwun.weebly.com/uploads/1/3/1/3/131380001/lirusuz_tixigadopo_larojebifiku.pdfIn PDF document text
    • https://sunatoruxule.weebly.com/uploads/1/3/4/4/134476105/1988155.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/iafeSge/26468212946.pdfIn PDF document text
    • http://goterebilife.22web.org/biogas_production_process.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/ggfpja6/lewowirevul.pdfIn PDF document text
    • http://avtoshkola-region26.ru/how_to_trade_with_vwaplj2xk.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/97841915920.pdfIn PDF document text
    • http://rrrrkkkkk.space/30241040317mrk6r.pdfIn PDF document text
    • http://wujasonuvilo.mywebcommunity.org/65956186694.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rasunafosav.epizy.com/41337750395.pdfIn PDF document text
    • http://sigadoba.epizy.com/2010_chevy_camaro_ss_6.2_horsepower.pdfIn PDF document text
    • http://josamex.epizy.com/64091759225.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_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 5828 bytes
SHA-256: 325de1b99632d9750cc05b88aca1363fd99ef822cc604a9ab43e44b63f3d1bba
font_01_sfnt_off00010072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 11084 bytes
SHA-256: 3a1fa30f7da0a22811d4593a6e2cb8e19943cbd351226d0b3d051d5325287723

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