Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed22746facdff980…

MALICIOUS

PDF

83.1 KB Created: 2021-09-06 00:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 375394284386c3acfc95d36ce25c9486 SHA-1: 34426d5264d068d94297da90013d55f18aabf5e0 SHA-256: ed22746facdff9800d4f63761ee57dd666b30e341edf986252015a1dac7b2beb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement with deceptive content, likely to download malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=pdf+word+d%C3%B6n%C3%BC%C5%9Ft%C3%BCr%C3%BCc%C3%BC+program+indir PDF link annotation
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/h69vpf0d5qhamsq0q7i7bm1re5/45033868603.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/0fde2db52632006e82f91c913e7563be/guguvixis.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/32270850417.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8be4d97fb0be3f8e0fe8b6c879a8525a/wumalaxezogolawebapo.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/mixoronufevifopofa.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9985a51aab---72621162537.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/76dfe09ef484e9997097675270a6aa5b/miwajos.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/gesakuketakudi.pdfIn PDF document text
    • https://wittnebel.dk/file/46655303352.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/69277205876.pdfIn PDF document text
    • https://artbynela.com/uploads/file/32685345610.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608d022e44b87---loropoguroxiwi.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608549ff1a022---posepivo.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/jatoroxafugataje.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/520aebb0ae210398ac21da25ba5bee87/1640604060.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/4927nkeschnbr8jrn709fg6m9d/7933563629.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/43543759395.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/galenuribojidaw.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a153f3309bd---97444345843.pdfIn PDF document text
    • http://petrduchek.com/files/jawediw.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/e69545688fee94cdc2f21433d66184ee/11146242795.pdfIn PDF document text
    • https://kaisar168.com/contents//files/ximafodoxerupet.pdfIn PDF document text
    • http://partnercable.hu/files/11612572328.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a5af84d7b---43866537908.pdfIn PDF document text
    • 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_off0000dda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA8 17324 bytes
SHA-256: ff830caa843aea77aa3f51649af7e15d134be9c1cc2639417c138f4894aaae87
font_01_sfnt_off00010a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6A 11352 bytes
SHA-256: 1e64a8705e811978b8c152bf7dfc00b8769f817273c7c32363c3b46e07935a9c
font_02_sfnt_off0001246d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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