Malicious PDF — malware analysis report

Static analysis result for SHA-256 205f2e24c8d819f2…

MALICIOUS

PDF

228.3 KB Created: 2021-07-14 01:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02a93b64d040dc079ce37f2170b16ca3 SHA-1: e78ea23109b7b641c44deba0aa82e98e28630c44 SHA-256: 205f2e24c8d819f248388583f06cc416d938f4cae93820f09c693bb38c462116
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of compromised CMS upload links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

Heuristics 5

  • 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.
  • 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://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da8e5537b0---samutomexafepeluruzirip.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ed566a4b6dc425a04068d43adafb5870/xenomiwilinigegaxovovaga.pdf
    • https://ceccarbotosani.ro/userfiles/file/jijisate.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bce13003e95---1759788444.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e94333a2d22---lovezufowo.pdf
    • https://legouic-peinture.fr/userfiles/file/sogalugamut.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/7e04ed3fcf318a2f7ce3689debd713bb/2666179090.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2735a19b3e---70343826832.pdf
    • http://msamericapageant.com/clients/873634/File/kewarogexarox.pdf
    • https://highrise.pl/file/ferivo.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/35fc2d6d27079f5db5966c424e1e44aa/44442127500.pdf
    • http://connect-event.fr/ckfinder/userfiles/files/tetikijalonejun.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160e196ba3b75a---50319810754.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a24eae3c339---dumesizeta.pdf
    • http://botosani.ro/img/uploads/file/likemugedisud.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/coi3kmb3c04hi902i50p2qe0pg/zoserupatumemegadomurepef.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/0fed5fa899d9655c577ac0440a5b377a/87970564123.pdf
    • http://viettelhaiphong.me/data/dulieu/files/83786283676.pdf
    • http://skpizzasubs.com/uploads/files/8538256520.pdf
    • https://advance-pack.com/editor_upload/file/kibezusonigab.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160794e6a3a3dc---15774128961.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/4tri7bbrdsqu68202vma2ae8e1/fojuzunakopuza.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=frozen+2+characters+ryder
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031d95.bin
4fa026bd3a01405d703b1a1080601abfb8fdfa6a5d60042361283c9f12b34420
pdf-font-stream PDF embedded font (sfnt) at offset 0x31D95 20800 bytes
font_01_sfnt_off00035317.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x35317 16792 bytes
font_02_sfnt_off00036b2e.bin
bcb2f552fd8c82a71fc3f568725294c26c25c1c487374db8210ad620dc9a25dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x36B2E 10600 bytes