Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a6009fff3508ae…

MALICIOUS

PDF

76.9 KB Created: 2021-05-02 21:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9f09f022ffdcf10e6d76b4c1a10bae3d SHA-1: 25df506c47f1c019f488675d838f0aadfb663165 SHA-256: f2a6009fff3508aef7f44d3f1019efdcb75f93cef78fa0001c37dd3c854e7dca
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of using many links on potentially untrusted domains to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://vilenefex.ru/strik?utm_term=c.s.+lewis+mere+christianity+pdf PDF link annotation
    • https://sulogifobib.weebly.com/uploads/1/3/5/3/135322722/b89b8b5b9ae36.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/mghzLgf/geguw.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/df54296a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_60041e51abff2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451369/normal_5fdfb53a4d9b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412902/normal_6042c2234b1fa.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/2jjHM5J/5118780401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445871/normal_603a0e2a98019.pdfIn PDF document text
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/jigijapinupifi-xiwediriwesuj-tawajezuketera.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/jiZghgc/bakoxubo.pdfIn PDF document text
    • https://najibiwamedixi.weebly.com/uploads/1/3/4/9/134901652/8420828.pdfIn PDF document text
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/zigizimozav_rozukajit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fc97e5a90b8d.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/2ih3LYm/22798368523.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/ahdicsu/2_player_box_fight.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/jigcmVy/simofover.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bivibepatapa.rf.gd/standard_shoes_size_guide.pdfIn PDF document text
    • http://roxonotagake.rf.gd/bundeslnder_karte.pdfIn PDF document text
    • https://e05bdd54-7536-4db1-b7ed-110d7b12163e.filesusr.com/ugd/dd5a80_04de7459c3d84e6ab91e2fecef733346.pdf?index=trueIn PDF document text
    • https://9dd02728-8b0e-4c16-8a5b-31b14a6ec887.filesusr.com/ugd/d8c3ed_fe5da4adb6cb41c480cde1431cc01e1a.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_8e08079200c64be09bd249e62e8dda43.pdf?index=trueIn 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_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 5528 bytes
SHA-256: a60ef1712e1c66cae8a337373aaf9a20598e6d6e7258fb5b46c467e6f802f3e6
font_01_sfnt_off0000fe81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE81 11568 bytes
SHA-256: fd6edb8ded534cdd62b1fec8b07ae875f444cc6863285ba0d8ad1c071f3dc166

Open this report in the interactive analyzer, or submit your own file for analysis.