Malicious PDF — malware analysis report

Static analysis result for SHA-256 336cf946dab8f654…

MALICIOUS

PDF

84.9 KB Created: 2021-09-24 04:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1f3c39ff0ff5a97149989a6de13ae3e7 SHA-1: ce9644ca3d0c53ebcc481e7904a6ce5a8a522e33 SHA-256: 336cf946dab8f654a8f863c217794aa6cee894b828e29a80c3ac0b6ecacb305e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://artistprasanna.com/userfiles/file/65738574777.pdf In PDF document text
    • http://www.petersonassoc.com/emailimages/file/lixusajalaz.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/33076574397.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/30897674334.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/pilopak.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/vofuxog.pdfIn PDF document text
    • https://henuopack.com/d/files/zemubazo.pdfIn PDF document text
    • http://afma.pt/site/upload/file/sixaroraze.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/dabelu.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/kugituxalogejipafixazedu.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/senodugixesabowibavuxu.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/lopalelefesufufuliguge.pdfIn PDF document text
    • http://nhakhoanhantin.com/media/ftp/file/42194809683.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/ferobatenevo.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/somupewepejixekij.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/91848753575.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109210236257853.pdfIn PDF document text
    • http://zgic.ru/!upload/files/nirafawimevimeponu.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/44310571206.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/fn8r3pkmk975ss75ahsegdf919/rodidufarejivov.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/jodejolulobexawowud.pdfIn PDF document text
    • http://tatnhapkhau.com/ckfinder/userfiles/files/xitux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+100+season+1+episode+5+full+episodePDF 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_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA77 20264 bytes
SHA-256: 5d7fdfbcd76c990923e76070ca42385412e8226b1e5fc1232a693590f44dfe68
font_02_sfnt_off00012d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5D 10768 bytes
SHA-256: 04761a4a29919db8a8524958fcda61be7b3133c3cf19d0fedca0e04f481ae0e2

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