Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e32a130164bf9e…

MALICIOUS

PDF

95.1 KB Created: 2021-09-02 22:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e3df669aa985f3e4fb60576fda50e881 SHA-1: 9057461f5d1deff226fff059da81892bbe7092d7 SHA-256: 96e32a130164bf9e7b947ab73e0e6f7f3d925df940587a1a30ef60b586ff9e3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the 'uploads/php/files/' directory, a common pattern for hosting malicious payloads. ClamAV and ML classifiers strongly indicate malicious content, with the PDF being identified as a phishing trojan. The presence of these links suggests the document is intended to lure users to download further malicious content or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/kmrpiq6qqmtkqgcmh2618einjd/dopoxekukerodepixujip.pdf In PDF document text
    • http://sity-luxe.ru/userfiles/file/69283309030.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/73774427205.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/17433294861.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/3392065060.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/73645050465.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/36734450608.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/6ea5eecfd6ee09e86102ed893aa3afd7/72523095397.pdfIn PDF document text
    • http://aven.su/userfiles/file/16765114173.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/zerajonagusolezagidalew.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/75726792460.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/60006907626.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611c66bf31832---60179713130.pdfIn PDF document text
    • http://faxik.online/ckfinder/userfiles/files/44470330035.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/24520384759.pdfIn PDF document text
    • http://birminghamseaholmclass63.com/clients/75362/File/kunobixodapuwurik.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/vizadiguk.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/17970076872.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/1f03993225c5e8b2c96439206d127659/gasonogonixajaso.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/15278852224.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/71276202552.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ujuabmn4vghto6alag5lqdg7r2/nifixurotim.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/15206663564.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/nawojalelozabusaja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pwc+sharing+economy+pdfPDF 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_off00010c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001242d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242D 11124 bytes
SHA-256: 736cae6e6d02e0328202fd577e76fe4a434fa9755a554314c2ad37e6c71bf785
font_02_sfnt_off00013dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD4 18608 bytes
SHA-256: e7fe2e4e449eac0bc33ea8960cef7fa6188ba5509fd2946e040c28353dd4bf4a

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