Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b9d028b4de86df…

MALICIOUS

PDF

77.1 KB Created: 2021-05-04 13:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e2bb766424035a647257e611829e9fd0 SHA-1: 65d7e86cdc4ca239b8b786c773ed60dd61463803 SHA-256: 83b9d028b4de86df06c6630fc6992fb2b4118ea007a47b85f78116123d11c4c0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO abuse tactic. One primary URL, 'https://soxebez.ru/strik?utm_term=rowenta+handheld+steamer+how+to+use', is presented as a search result for a product, indicating a potential phishing or malware lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://soxebez.ru/strik?utm_term=rowenta+handheld+steamer+how+to+use PDF link annotation
    • https://cdn.sqhk.co/sulezudipozi/cjfgcge/plane_crashes_2020_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/3gdhdPH/cavs_rumors_bleacher_report.pdfIn PDF document text
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/pepejijesijeju-nedosaniseke.pdfIn PDF document text
    • http://pegixudovojap.iblogger.org/anaesthetic_machine_user_manual.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/5293623.pdfIn PDF document text
    • http://tajawuxelefa.22web.org/53421648652.pdfIn PDF document text
    • http://tukegutodobo.iblogger.org/sinais_e_sintomas_anemia_ferropriva.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/saset.pdfIn PDF document text
    • https://cdn.sqhk.co/kotolodegag/hji2hhb/44846017485.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tizabapokumi.rf.gd/zudaletonezafaz.pdfIn PDF document text
    • http://xofedebowin.epizy.com/c._a._s._e_animatronics.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/20676243133.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/menimudujedizin.pdfIn PDF document text
    • http://dekifovep.epizy.com/22224344982.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/history_a_very_short_introduction.pdfIn PDF document text
    • http://wadatexutogowig.rf.gd/13473491523.pdfIn PDF document text
    • http://xatudoxi.epizy.com/masepavixexafuxujosisuxoj.pdfIn PDF document text
    • http://niwepikos.rf.gd/77429950762.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/apprendre_a_ecrire_le_francais.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/dawson_precision_tool_less_guide_rod_trp.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/chaska_song_pagalworld.pdfIn PDF document text
    • http://jotowit.rf.gd/dekusozazofarugogojuwadu.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/2010_forest_river_wildwood_owners_manual.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_off0000ef25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF25 5164 bytes
SHA-256: 8b72ab60a72808d1b907521647307be34cbabba3627653b2602d698fb91cd367
font_01_sfnt_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 11364 bytes
SHA-256: ebe9f2d18d41a8ef5b6b71d1deed132de11ac051c3cf77178422d5e4e9e6f9d1

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