Malicious PDF — malware analysis report

Static analysis result for SHA-256 04239149f253615a…

MALICIOUS

PDF

145.7 KB Created: 2021-07-01 22:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 32eeccd158c5e5216dd9dcee1f25eb27 SHA-1: 39718ef035b3ea9ea5b8a7f9187649aa7ba3836e SHA-256: 04239149f253615a5815d06f0f9f46081ef2f7ce4dfeeac7491e389dd5f5a8cc
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting a phishing or redirection attack. The document body is unreadable, but the presence of numerous links to potentially compromised sites strongly indicates an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c6577f2069a---naxezubelal.pdf In PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2812f68003---99396059148.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/446bf1cc6eb1f7a025d394c24844abcd/sonolizofalese.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/vumasizeguzot.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/7d989e51bf3cfdd3eb5275799a58afb7/givosopemepir.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160950629989f1---perekebova.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/bigikekakafi.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c868576a34---44156507826.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sexuxijakuritujexa.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f5495afc3---40757914862.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609820d9f3ae6---71776693325.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/45949742615.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/40276658503.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/ba8ac75b1115427e36f2ead52fa1992a/25667989677.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/tg97pod9q1c41qfetamg8bac54/zusomiwenepemo.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/023559cb2d43648115e6d0e01dcebe29/61460637670.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/lovimevizexitubevobuzuna.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5cac70105---gowuvuk.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/d36f9ee81b7b2bf07cb7956f8e547382/30969578314.pdfIn PDF document text
    • https://t2sc.me/userfiles/xokewusol.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3044b1a3e---suxovizoraz.pdfIn PDF document text
    • https://patc.fr/imagesfile/sirexuna.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160abf7cbd2e27---7036057468.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=cambridge+book+3+test+2+reading+answersPDF 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_off0001d5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5C6 18488 bytes
SHA-256: 93b93313870d35bde3d9aee3657abaf5c217d3fb3a5a6db1432f980bd0d94511
font_01_sfnt_off00020701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20701 11184 bytes
SHA-256: 741053e75b243caff19527e5fd6bce0e7125f0b87051140b80ab889f11f0f340
font_02_sfnt_off0002211c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2211C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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