Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee1e2c04a30f266…

MALICIOUS

PDF

80.6 KB Created: 2021-09-07 16:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: db6f918e2edd20f96ddb84f6a407c00f SHA-1: f72346ce1a662d71609746a00eae0b7235300e18 SHA-256: 6ee1e2c04a30f266db4a5e45204c8812cc3821e146a35760b390e5c331c07667
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URLs are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allytemp.ru/uplcv?utm_term=cat%C3%A1logo+o%27ring+parker+pdf PDF link annotation
    • http://summithigh49.com/clients/3/33/3334069ac8a672cbece4a9536eb221cc/File/nareleg.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/80275385070.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/99755157935.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/47293899522.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ffd498ed28002846fa8a7b39f6c610d2/pamajirefefitejiw.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/60297041579.pdfIn PDF document text
    • http://atallmed.com/userfiles/files/gerakinad.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/pedukodabopa.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/9gu8rod4h2dkboou4bf3aome67/juzow.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/27244427953.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/fosimitobolu.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/37684602227.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b78bfec7913---89767940606.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c7a659db2---39283431463.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/92149372639.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/89ca46685b32a62ea9b5a5ae856a0fea/zulirusigananud.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/69391390332.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/73093679941.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da67041852a---34080379135.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/saxigubojisiwulobowajojum.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16121b3f6498a2---78689593786.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/fegovubekizexanomimubapel.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/lajizotik.pdfIn PDF document text
    • https://hagepoorter.be/files/files/86603660847.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_off0000d091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD091 10844 bytes
SHA-256: c36060d95d0769e20dcdc8624f6eb964976f22c05cd4c4d9062984bd0cd64a56
font_01_sfnt_off0000e921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 19576 bytes
SHA-256: d2bb14a669c4bad8ea10838f6bfe8c765e951afdb988a17c0f0da963751537b2
font_02_sfnt_off00011a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1