Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddeb90c54a617c3…

MALICIOUS

PDF

76.8 KB Created: 2021-09-01 04:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b215e7f2117020ef8a7cba894a2b2441 SHA-1: b4939ad56a867a24831848383c2207a9688ca512 SHA-256: 3ddeb90c54a617c3779aa6c817d5c683e33113424ee0c99e2264ad50aff9397f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farms on disposable hosting indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ketchas.ru/uplcv?utm_term=how+to+unlock+leatherface+in+mortal+kombat+xl PDF link annotation
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d83e2f42bd5---zemomujas.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e61530d64---femirokaxadomomawivekilor.pdfIn PDF document text
    • http://vtaky.sk/media/file/48214171068.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/zakurofajoxasa.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/16132164182.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a3dbbe42428434a45f37a59553e162df/51722794724.pdfIn PDF document text
    • https://stopserv.ru/files/file/zuzugipika.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/77542428316.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/3f4513a9eb34b04c6e533adb48a53c01/nuxikiribolulitumafodip.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86e91990a1---37049152892.pdfIn PDF document text
    • https://renetravel.ro/images/files/86337139552.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac6e48bd12---livikopomu.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/204983907.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/vukufugis.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/bezifa.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/zubirejasitojaxiguwu.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/18018398918.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/86625271922.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160aed024c0e99---nurawebovafigisimupo.pdfIn PDF document text
    • https://latework.cz/soubory/fugaxifunutinuloj.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/q79vr0nn72at6a6bskbcjknsnt/25125256129.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a23fcaf3280---jamemoz.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/521d4f71023a74213de244ef9b04db32/82476859996.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_off0000c835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04C 10944 bytes
SHA-256: 8fed167c9d482191c62fa136fd8a9af22ba46c4da4c33c72535366a80e04ce8a
font_02_sfnt_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 17148 bytes
SHA-256: 7afb88772692e3961c37489b786538bb32ffff115da19197baa7ed5ace6af586

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