Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb45002db78a281b…

MALICIOUS

PDF

71.8 KB Created: 2021-02-14 18:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 13a6fa141345bad3699458cddaede2ff SHA-1: 9ecf41f6527127ac2f519afa3755a5ea52c5d494 SHA-256: cb45002db78a281b16498407ff27ce8082856cf3b6d754485a7ef63ac0c94b17
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wb?keyword=ghoul%20trooper%20minecraft%20skin%20template PDF link annotation
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/496272.pdfIn PDF document text
    • http://com-signto2.xyz/tuxabanilozopyxmy6.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/1AHgcsf/wesewepidevopekupewafo.pdfIn PDF document text
    • https://vezijukifi.weebly.com/uploads/1/3/3/9/133997169/wowofaguk.pdfIn PDF document text
    • https://cdn.sqhk.co/zifixanuk/bPGgegg/91655715188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5ff3a337ec21e.pdfIn PDF document text
    • https://vazaratel.weebly.com/uploads/1/3/4/0/134017227/xosovixosoxodufe.pdfIn PDF document text
    • https://cdn.sqhk.co/tikatonasa/CfyohfV/buranunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_5fe91d59b7e13.pdfIn PDF document text
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/sokigojigawo.pdfIn PDF document text
    • http://rejasepilibuxep.iblogger.org/free_flat_design_presentation_template.pdfIn PDF document text
    • http://dusosax.66ghz.com/pijisujewapi.pdfIn PDF document text
    • http://frontglass.xyz/11574170528q061p.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/0283f1.pdfIn PDF document text
    • http://nikecortez.net/ruwutulabogezisu0pfwf.pdfIn PDF document text
    • http://subbellassecret.com/xulufon23hna.pdfIn PDF document text
    • https://cdn.sqhk.co/jajotulix/hfESkH2/children_s_chores_list_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memavopunon.rf.gd/tokyo_guidelines_cholangitis_diagnosis.pdfIn PDF document text
    • http://gafibis.epizy.com/papiwewaxelatote.pdfIn PDF document text
    • http://fofilelajisemap.rf.gd/14646390047.pdfIn PDF document text
    • http://webidiwotew.epizy.com/forks_over_knives_movie_worksheet_answer_key.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 5352 bytes
SHA-256: 9b2dfac4e3ba4524e0cecd8e7821d3edb3b4d4b05575bdba32e5bddeb41a5e94
font_01_sfnt_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 10336 bytes
SHA-256: 79fdb234a0d8481fcbed3443876f8a9eae06dd98ed59b3bcf89420377923339f
font_02_sfnt_off0000fcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD0 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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