Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20be33014bf9c57…

MALICIOUS

PDF

76.3 KB Created: 2021-09-02 04:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f0ea2ba3883596aa5d5376b672c8096a SHA-1: 1ac4e3f0b6b28b05f56caff01d934a487bc0e66e SHA-256: a20be33014bf9c57f74977582711274b02d58d136d5c2f50a26d2458e0ee04e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ade84bdd0---11608517944.pdf In PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0253179520---xituwujamufitax.pdfIn PDF document text
    • https://melz-feu.ru/upload/31008995545.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/wojozavoxomuxevo.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccf2cbab07---podevelafogesaxadu.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/kuwixameso.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/diwudatezuxinotu.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/lusovulubapexekeloluduma.pdfIn PDF document text
    • http://deltools.com/userfiles/file/mikomujonuvegidiwuvugitom.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/82674199714.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/sonimepuxumadulegoxavo.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/e7c7b338ec74e27386697a0227e134e1/gemopepunuzogikikop.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/81858029836.pdfIn PDF document text
    • https://abeess.com/userfiles/file/16790444203.pdfIn PDF document text
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/xafim.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/53792736020.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/74550966673.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/693dcf9b905dca49b2ba0ec7c2c29709/wibimibafoba.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ec3aafb04cf83f9673600ccecd050b6a/limuzikevuxen.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/kukijawovoxa.pdfIn PDF document text
    • http://brlairport.com/images/file/12663393092.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/gobageragupujevixadoxud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=chicken+nuggets+carb+countPDF link annotation
    • 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_off0000c6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C3 16844 bytes
SHA-256: d2518b1e7cb8b13ca88eb36b9146102f825739cf6d7bf436a094606616299c24
font_01_sfnt_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 10824 bytes
SHA-256: ec9b1110b6d6664f55c4038bbea0ed0d6c6bfcc350652499a439bca892a10e7b
font_02_sfnt_off00010b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.