Malicious PDF — malware analysis report

Static analysis result for SHA-256 d597065c54b38218…

MALICIOUS

PDF

90.9 KB Created: 2021-07-03 23:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cc30078379cc542cff226067069f73e SHA-1: 86aed067a4b15b082f53b6209c348345f6e80e73 SHA-256: d597065c54b38218477278c784146eec85b81ce231756ee076f56c6f381b129f
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://crysiq.ru/uplcv?utm_term=what+is+hog+maws+and+chitlins
    • http://2ds-creations.fr/userfiles/file/dijupevutato.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/06a7c80cgtpfth0nl0049fgh34/limafuvevobezirajabamed.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210528125448.pdf
    • http://loadcell.vn/Images_upload/files/47517512020.pdf
    • http://hosungtour.com/FileData/ckfinder/files/20210630_9E5E24810A8D9BBA.pdf
    • http://photo-preiss.com/upload_files/files/doboxeva.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/9f688ba977ea3892b618be4bd64370b1/nofolutujeresi.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090f749c0283---70859148475.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3caf2368a6771589a037b66c9ae3a102/wuwif.pdf
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/depuzaw.pdf
    • http://cabinet-blin.fr/ressource/site-image/files/xewegininotese.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5cc30ff8776523c65d81e855b87bb4c6/pawetedu.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16095c8c03996c---zumudasimefi.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49e2e7710a---90158609926.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b976030f26e---19230120355.pdf
    • http://controldellaves.com/app/webroot/arxius/file/97187574955.pdf
    • https://baobihungphu.com/media/ftp/file/86600259182.pdf
    • http://hanlacsclub.com/ckupload/files/vedowutivowuwine.pdf
    • http://www.contectrade.hu/fckfiles/file/27344115380.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074911a902f7---jimutexagozafoluwagele.pdf
    • http://harchovyk.com/userfiles/file/44082361017.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160cbddd8490ec---49697693023.pdf
    • http://macautemple.com/userfiles/file/zilemuvaxewisetazekiluder.pdf
    • http://aranykoronakft.hu/userfiles/file/wavaperubiwexod.pdf
    • http://thsport.dk/ckfinder/userfiles/files/35558878313.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_off000100e9.bin
2880ee6ff3f927126b06030e56ac85ad4161ea11653a67993b9398d04234e168
pdf-font-stream PDF embedded font (sfnt) at offset 0x100E9 17500 bytes
font_01_sfnt_off00012e2e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2E 16792 bytes
font_02_sfnt_off00014645.bin
d2b9d1ab7eba16ae50c316bbad80c284eca93b9067c9c2704f1c6b296d90a491
pdf-font-stream PDF embedded font (sfnt) at offset 0x14645 10664 bytes