Malicious PDF — malware analysis report

Static analysis result for SHA-256 209b061027e16d38…

MALICIOUS

PDF

74.3 KB Created: 2021-02-24 01:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4be384d2e8f6dbc8f795c7523cae43d5 SHA-1: 964f999dc1b1d6f5b35906085361e48c5f971dd1 SHA-256: 209b061027e16d38454e8a904ee0d0b1329668c881c5b742263183f6042f7305
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external URIs, including one pointing to 'baarspo.ru', which is likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to crochet, suggesting a social engineering lure.

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://baarspo.ru/strik?utm_term=how+to+crochet+mens+sweater+vest PDF link annotation
    • http://bottlechainworld.com/bizanukivadomilagezdaluz.pdfIn PDF document text
    • http://iranomics.com/lafowatikonurowadixakowikuxsm.pdfIn PDF document text
    • http://help-ruleviolation.com/bukunfezti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443326/normal_60270522903ba.pdfIn PDF document text
    • http://car-test.pro/canoner_guitarrantsce.pdfIn PDF document text
    • http://rigovutamejebum.iblogger.org/50994250025.pdfIn PDF document text
    • http://meetlait.pro/feweditugunumipiwofo1nb5l.pdfIn PDF document text
    • https://xixusumer.weebly.com/uploads/1/3/0/8/130814933/8815176.pdfIn PDF document text
    • http://uspeh.icu/ferromagnetic_materials_reportnw6gv.pdfIn PDF document text
    • https://sebipujo.weebly.com/uploads/1/3/5/2/135294987/patojufoxe.pdfIn PDF document text
    • http://idealica-co.site/mfj_259_service_manualxgr4l.pdfIn PDF document text
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/7663346.pdfIn PDF document text
    • http://alcexpress3.xyz/gijedumovb6221.pdfIn PDF document text
    • https://wiwokuvivatazu.weebly.com/uploads/1/3/4/6/134629214/6848479.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tosopipates.epizy.com/june_2019_calendar_canada.pdfIn PDF document text
    • http://xokolupagemi.rf.gd/the_saxon_tales_wiki.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_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 5120 bytes
SHA-256: a91c882cb087bbaf46043a81e6f4ad8931dad3be4d4cca74c69e2eda2884debb
font_01_sfnt_off0000f7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B3 10836 bytes
SHA-256: fed813f0a04b8ee591c32b86f70af2c31ea46434dd89b55beca1a546c319a96e

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