Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fec1355e040ba14…

MALICIOUS

PDF

81.8 KB Created: 2021-09-06 07:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a9a30a7604f67c6f3aeb3990cfb14524 SHA-1: f1340766117abeb5ae1ed0a309df396be05d9e88 SHA-256: 2fec1355e040ba1441836bb0e62b1d1fc609b421f6a05cef3a2cc6c92a99aeae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the detection suggests it's likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://unifor975.ca/userfiles/file/3661511710.pdf In PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b2825cad63a---9906330369.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/gijepatuxekinebade.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/54829134467.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6f6ce70ae---tomanepibitumibabugipesuw.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/421392ca0758b553d9b04e06ae8d6c01/lewisavajobolefa.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1a5a753edb2ea0f7239c3da482c1fcac/82380089250.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/guwosiduzujusopijer.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/xepozitomej.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/66879404528.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/42631226872.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/xipenulefeniwi.pdfIn PDF document text
    • http://446888.top/userfiles/file/54212946756.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/84097424215.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b6dcebe3e---jepobixomepuwujusas.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a43654c40---56707979430.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/kadixezeraruzobekimiver.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/ac07735d5653e2a0c462c24b55d015d9/kezidevepilubibepegi.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1085234bd---lujiwepofelifibeli.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/46681556306.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/59430131705.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/17973f53123e83c30deab8526357d30b/zenukinejukozipezelobuti.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9igl2nj6fkl2u3cdjofn7tl867/21371911186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=buscopan+composto+gotas+bula+pdfPDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/98347131631.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_off0000d904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 10932 bytes
SHA-256: 333efa19391c593cfa3d0fef63a765b93a9e8ce5e29d1a7cd35eb8ae69316ea6
font_02_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 18448 bytes
SHA-256: 844c0bbbc67de48db52935fa8c3dce817e1cc8b66bd61ba35797d8d902c2868c

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