Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7504d3924a0dfd…

MALICIOUS

PDF

78.3 KB Created: 2021-06-12 10:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33ece24e2f0b18ffa58cce95d737d854 SHA-1: c5ac481d20bc828cca73d51008df52bdf7ab34e4 SHA-256: 9a7504d3924a0dfd24530711a0e12fa37effcdce080e395cbbc89eacdb5b92a7
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to compromised WordPress upload directories, suggesting it is used to distribute malicious files disguised as free books. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://drafthe.ru/uplcv?utm_term=fake+book+pdf+free
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/5d3453801a40b8c741492b50f684b371/bifudalavumef.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/moxisumediboxomezabiw.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/73bcabcd3dc68552553a6cc16d2ee799/nafigobusijejujuf.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086845cb7646---70200180543.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c695ba5215---dopotodapokitidefonizo.pdf
    • https://efnnma.org/files/file/tezuxiwosaxozi.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nawuxituverupiw.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e437ffc69b02e640141a4a1edc8c1c7a/pawijetukefob.pdf
    • http://hanhthien.net/uploads/file/muvesimexaluxapudelad.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098422929be8---45376244327.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbd7e43c4e---66589150894.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/e775d2a90373c153a85d0fb116ed8e84/kalazeketodoxew.pdf
    • http://absolutelyneon.com/userfiles/file/75802459978.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/sp6ctggknbj7b8d64ka534hu62/bozen.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfed752eaa---sasalasofuxabatufuw.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/8a36kl7sarj3ba1n2pb3v2i847/mojimi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f609.bin
b3a24afe19b6fa5b0220ae988c96cf9f6dc6bb3f47567ee2c38e54f077a15388		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 4984 bytes
font_01_sfnt_off0001070b.bin
52a43a88476a98f83c60093e92c79a6d2f67e3638bafdd807dbe2774b727c121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 11252 bytes

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