Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de06c1a90ea748b…

MALICIOUS

PDF

78.4 KB Created: 2021-09-03 19:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c1d9cb36b44fac2acd879a35169451b SHA-1: 92d8f2cdf8fc8b9b8cab6b85ee0d78cc85a93e7c SHA-256: 2de06c1a90ea748be018a36a3853e7cf3b6e8340b869e0e286a2c2025d90817a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://garmagostaran.com/Upload/file/zulapazanatopejibulosif.pdf In PDF document text
    • http://high-keenltd.com/userfiles/file/vizixuvagavo.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/58104322421.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/juzuzonugobufilanawuzoji.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160eda2b810b48---75606040335.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/58a55e0ee5900db5ae25527eef946ca4/95448459882.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/53acffd86df0056ad17e0801f8c651b6/jegejelofitogiloga.pdfIn PDF document text
    • http://centronegozi.com/public/ritagavabu.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a549f3398d---84349518329.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/fisokomuzelu.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1004e586cf---bototidatugexawowugodizi.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/vosodo.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/oqqqblb9tb88ujd1pgvanlcjd7/34655272140.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/wizefanikodes.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/wopaxidanebufesuzubusaj.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6257156a9b---74583315067.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/gudonurafupaduri.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/winojatuzomudile.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/84061640694.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/73614293837.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/13914652903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=aripiprazole+davis+pdfPDF link annotation
    • 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_off0000d01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01B 10396 bytes
SHA-256: 9ea2a2ca36f6d986bb93554bf880dd8bf45f37c9fd359ff11df37658bc07e640
font_01_sfnt_off0000e7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CA 17136 bytes
SHA-256: ec2e592b8a8d6d1b04603480c970eabae706a326a814c8f7ae5cff2a58b1ad9e
font_02_sfnt_off000113fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1