Malicious PDF — malware analysis report

Static analysis result for SHA-256 402b028d43c040ed…

MALICIOUS

PDF

73.2 KB Created: 2021-09-03 08:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c95f06c2b20f37bd802a2b0ed2696b88 SHA-1: 3a5016b7eef54001084f8fd79184b2c13604c733 SHA-256: 402b028d43c040ed630b8b0285a24f4b12a5c8e491f013438ff46f86bfdac037
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous PDF links and the use of 'utm_term' in one URL suggest a phishing or SEO-based distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://lynhuagiasi.com/Images_upload/files/tolozubemitusonuxojoda.pdf In PDF document text
    • https://lufty.cz/UserFiles/files/11867991317.pdfIn PDF document text
    • http://unsersohn.ch/images/file/95618505604.pdfIn PDF document text
    • https://castel.ro/userfiles/file/10040934475.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8a85cfdaf---xoxumivarig.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/42957b9b14ebd517030fc299cffd525a/25022565733.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/22099257458.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/461bd34ebf6125abf12924b83efe3091/kixoviwizurexomugisutovot.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/xaraw.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/butizuxavovelejemaseja.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/uh7jrjqivn7surmcplktaj48ro/47002550622.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/75014339291.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43bb2b2f9b---nalefa.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff4eb25f6b5---wagajuzunuroxufagunuz.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/vokarumegeja.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/12091543421.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/viduzitowidebe.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/xikilobob.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/b3e51c8e09d8979f5bdc3181498d34de/luzuwekizim.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/44695254363.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/28264764613.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/fubogod.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210529205349.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/57729865840.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=akbarnama+in+english+pdf+downloadPDF 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_off0000bd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0C 11148 bytes
SHA-256: 0a935d9fb86373017be473adc530f96c089c5f24157c1085e82ef8f615b237ca
font_01_sfnt_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 15708 bytes
SHA-256: d88d26f181f6ab6a113e23e049751cc324185a159d81baabc9d1da9f6f460b4d

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