Malicious PDF — malware analysis report

Static analysis result for SHA-256 9294f8204960994e…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 03:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a56c26388eff8ae3e7771b9a560b23e5 SHA-1: f546171479320771f6314296d5a20e24d0324e19 SHA-256: 9294f8204960994eea9f64f43e27ad0c639beedecf8ad7b32699833f70116ae7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external URIs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the classification as a phishing trojan strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=v+bucks+generator+without+human+verification PDF link annotation
    • https://soccerauquebec.com/userfiles/file/wajejudekifuwemolama.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/rolanabudemitebenupek.pdfIn PDF document text
    • http://cssh.es/img/file/76751835374.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/ladexew.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/jusojunozuden.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/musalumev.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/gaberope.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/vijonetiwunaja.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/27044541441.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/70057138593.pdfIn PDF document text
    • http://fivelscope.net/fckimages/37154437210.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/72955388938.pdfIn PDF document text
    • https://mackbeks.com/files/file/nosaboguzu.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/57161514766.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/82447572529.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/nozekifepuniziluguxu.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/12604611352.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/rikoguzebanoxapit.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/42962206363.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/51071799817.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/bisifatigawu.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/libavon.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/431704944.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/13681603145.pdfIn PDF document text
    • http://sushibelovo.ru/files/46981992206.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://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_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 17652 bytes
SHA-256: 416017cf4aee55de6e607e426150fda1b34f214d3a631ec4821026306c509c56
font_01_sfnt_off0001080b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 11188 bytes
SHA-256: 0a3eedb483156b4696de4656968972958deb954783038498d26289c50a03b9f8
font_02_sfnt_off0001222f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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