Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3234dcd600f5206…

MALICIOUS

PDF

80.0 KB Created: 2021-08-10 19:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d387965f288fae528f47fcd6a2118af7 SHA-1: eba0a599c185c3d4fa1f3e4d0c20bbbe2e4d5ec4 SHA-256: c3234dcd600f5206c9cbb855263f1b97250e20bbd2ac003d0a9a6dfa6da10f34
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://huntic.ru/uplcv?utm_term=block+story+cheats+for+android PDF link annotation
    • http://red-persimmons.com/upfiles/editor/files/69398932969.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/s38ejq2q1h2hnqg0im7k2feobv/putinobefifazovatubapo.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de16f7caf72---zoverokofulisojesen.pdfIn PDF document text
    • https://2acontractor.it/images/file/mejelizelupodupalipenamu.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/bumexisiz.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/49079161285.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/59q8bpcdja1u7vvki1d6ptrbt5/93439301438.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/niwokajuvijetubusapume.pdfIn PDF document text
    • http://palami.by/images/file/puwigow.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/munetasepemozoseko.pdfIn PDF document text
    • http://tulga.ru/editor/files/verofavafomozesowuvuje.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/41813830748.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/08bf8c2b45e49cb1958df9c0d1b106a8/19517435202.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/13597642046.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ae1735d37b80917237c2514f3e7a2f0b/bevekisatenenusotapem.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/17654416643.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82dc700d87---13004920338.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f92340bdf5bc7265cd48d7614072438f/95965399.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/eee55cadb2b76fc2109aa0593d526c43/67164145381.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/47834935934.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/1874455cd0263284e6ffa617a870df52/43214659609.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160834ea7a93b1---nibomiz.pdfIn PDF document text
    • http://fotossc.pl/_files/file/87803116302.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/3rgn5ag620q7o5ht11jpvr5lm3/42469511802.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 16748 bytes
SHA-256: b8d966c5048f9dddf67877ff3cebd37e9a86293002681a2007c424b63de01391
font_01_sfnt_off0001195d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195D 10832 bytes
SHA-256: 744033618a088db992a02a068c13049f5b5ce873676abd4e6f8c9cb9c74ca83e

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