Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3773659553b686…

MALICIOUS

PDF

101.8 KB Created: 2021-06-30 04:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 697dcd5e72b4c8ba1f0d1eba1bb5d701 SHA-1: d14a4c42f4aa5bef17491b300abfa557bf295044 SHA-256: df3773659553b6864fe6e55ae0a2665f6d26d9305065c9e6f17cbc498b4b5249
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/d1f1aed438e5ff44e69b256c5e28fc74/72226878104.pdf
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/59389917856.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe717256e5---xabosipamunegoriwedevemos.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/6624d6eb97cb18570498b2a9a816f415/9758685500.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d93df3b3e0f---10930362862.pdf
    • https://hotel-la-licorne.fr/userfiles/file/jomalokaruxuvavino.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2aaf40b10b---26588849512.pdf
    • https://istanbulbalbir.com/upload/ckfinder/files/99532319285.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/d6b0424b6fd19d73aef83a1c2b270015/27583508139.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098313d98682---panupesod.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/74mgd0uod8dm3umr0enhv0c261/biwoba.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7318c0bff---33546357390.pdf
    • http://comp-art.ru/userfiles/file/56695127796.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f116b3986f---vagesonuluxod.pdf
    • https://boyanbolyarski.com/userfiles/file/kozizajamavej.pdf
    • http://rocb-ap.org/file_media/file_image/file/xawofonobuwixi.pdf
    • http://abpaluso.com/upload/file/jeraxemopavomawatusoluma.pdf
    • http://sklepjola.pl/userfiles/file/5861159524.pdf
    • http://kubak-ubezpieczenia.pl/userfiles/file/wujupizigimebilon.pdf
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/8rp8dq75r3rfu4plq2b8hb0lhj/xonenum.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/5l93b60566nn6d7uug73f2bcdo/vobeparev.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/85c39e5adbd08530100c47dbd6f8c3ce/femaxuvoba.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/75189c34844547fc4c409a873c714bfa/64930371309.pdf
    • http://yuhenganquan.com/userfiles/file/20210623045946_824221488.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/r396l98q21jg54834e0mpt5dkk/54002767300.pdf
    • http://sola-brothers.com/userfiles/file/61112945778.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/dff969bc641464a735f06b2588f8b53d/supamiw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=effects+of+long+term+malnutrition
    • 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_off000129fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129FD 16792 bytes
font_01_sfnt_off0001420f.bin
5251eaf34ec10c58277ce093eda2f171de5ca5ae79636407652b86dbeaab85b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1420F 17736 bytes
font_02_sfnt_off000170b9.bin
62a2035c51ee009e4700676f7feac5827cc4663a9ef1e161a04a52e4cfc6ef06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170B9 10760 bytes

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