Malicious PDF — malware analysis report

Static analysis result for SHA-256 468ae2c8986e26e6…

MALICIOUS

PDF

88.1 KB Created: 2021-06-27 05:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fe12d422e78003aa231995dd288414ac SHA-1: 8368f53058855885a8f5c9f7e4f0df2481373b16 SHA-256: 468ae2c8986e26e667846a311123d7f37a1bb249ff566a98ed77ef102f4f199a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f947d5343f---xuselozuparadaj.pdf In PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/6aea5eacb1af0af0af14cd9d47f383ea/nokujekaralinopi.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/nuzilajufosawi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c46ad53fc54---80144966285.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b519a7c4---36002295090.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zezutewigudunuzopuk.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/mui26q5i66miompukpi5cka9e7/4594622851.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3f413dc7a---99672885276.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/kunexu.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607079399ec0f---fokozonetilizeris.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/59389074975.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/8a1d42160c138a67e6a904db257019d5/76434086633.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/bemuvugilorajuka.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/zuzurifusodoba.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/suhln6upfkcamkp8rqt4ds7all/monuwa.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/xegirizabukazubanotuxo.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16082e9ac53bce---keviwurutekupedaximat.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b3d8091a3b1ed35296c70ccabe7c96ff/50906481634.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cee3527937---57972298266.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086d06bb0e6b---tolisefozi.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/64370265735.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb45ac29e4---39379031920.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/98590657211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=student+mark+sheet+in+excel+format+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_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 11252 bytes
SHA-256: 95b82cd8ac9b76750350137ef765afe57a50c2e1abd618f1dd0cbc4cff185c54
font_01_sfnt_off00010c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C49 17768 bytes
SHA-256: 473aa9a0cf20652cc3eb34665faac3a6af2df144cd9d868f72b7352615b8e357
font_02_sfnt_off00013ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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