Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3bab725f92dc3f6…

MALICIOUS

PDF

99.5 KB Created: 2021-06-27 21:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4137ec7ae3f151c90e70c74d2131885f SHA-1: 662ffb9a578ba49728fe2d3e48186a296ab7eb93 SHA-256: d3bab725f92dc3f600469df156278f368dd8d5f8c3f2465b9ff5f66ff0710b4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and link farms points towards an effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://ketchas.ru/uplcv?utm_term=charity+business+plan+example+pdf
    • http://shuimotongyuan.com/userfiles/file/27448853238.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083fed2974d2---luwaliwar.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa10039a6---62740082890.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077f79c24ba4---jajiguvalomepufon.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/annqt2m8kt9sdb7i6gcu5b27kq/29849432032.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf135e333c---ferubevugo.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/b2ug77c8up9g5qjsv9056oi2nv/10628208926.pdf
    • http://geniuschulatutor.com/userfiles/files/zitop.pdf
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/98631594159.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b25ed647ba1---3709360218.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ecc0bb6f7b---54104163622.pdf
    • http://jonmechina.com/ckupload/files/tawukufofov.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/41a40d770272b5c2c15c3ee43ca2df12/kanoxoxibixuwijikifasako.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/47900728388.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/a0574d2b911fe39bfc26109d4212d219/fiwewubeleborozubata.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e6b5696be---96842256510.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1140ad4a4---fowewa.pdf
    • https://baxsporthorses.com/userfiles/file/ripinidanujez.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5a812afdd---21801340167.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/88cb606783814730a45484dcd280c6e5/52827188393.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/pg7cgab4b15tbolakjk16gdpta/bewijet.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ce2c922f4---sulawezesurajogej.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/3khnhb4udq2rgavulvmnvkqchq/21226994453.pdf
    • 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_off0001213d.bin
3e0c0dd19f7f193b1492eb3dc2fe5db7a5e759211fa1f7036651e2b505d22e39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1213D 17564 bytes
font_01_sfnt_off00014efa.bin
6e2bf31289a434723a89efc89f12b0195693ce9a300b8dd4ea19da9bb4bd18cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFA 11132 bytes
font_02_sfnt_off00016898.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16898 16792 bytes

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