Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddf6f4121c5c49b…

MALICIOUS

PDF

86.9 KB Created: 2021-07-06 19:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 19d6e747cd76e47d7b275d689fb60240 SHA-1: b22b77e03fd0fdb977f1c599ec6b41bb392b3656 SHA-256: 0ddf6f4121c5c49b11ed06a718b3df41959f06f7a8c66147caa4c0ed9eecb13b
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of numerous external links is a strong indicator of malicious activity.

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://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaff7473f5---gopuzodobumozit.pdf In PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/d033b46033be38cc486a9e00a07b4d20/28175439786.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/vejewa.pdfIn PDF document text
    • https://eucolait.eu/userfiles/files/banalanavuwubetijogax.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/510t2i9bs3g6fjd9e5njc3i2i6/lajaxexawijajazivilexiriw.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c0573a5df---wopar.pdfIn PDF document text
    • https://lordoptika.hu/files/files/pewadufinaf.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/7738806db6e19f6076bf3d0ed7f38e66/dupetu.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/97cb08aqs3mffhd6doleccv389/dopinegininemetenewewifex.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/nkcs2etd47f02iksraes95uv3a/93154719885.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf47a3297---sigiwiwegasetexesafi.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/falin88ik7rvfdnnkkdk2eg9a1/waluloxeno.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c994972ca4---33466182095.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/74479799240.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607df35f39a04---73391760099.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/mizajorumekuritixenowi.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/92932025348.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7ef581e10---6369757692.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/pbphoifs8v9i25tgs0t0ik4ob8/tuwuginosofagirosimodalad.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/soxifirijonenumipax.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/67186190879.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/modinasuwab.pdfIn PDF document text
    • http://ahoba85.com/clients/2/26/26d353b61ac95a99d7df5001a3d58300/File/kusegejigabolikisobo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=icao+standards+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_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 17932 bytes
SHA-256: 9431862c69a4553371aabffd33f9c9ff540f9121dc3e27341d7efb387a0f5a4c
font_01_sfnt_off00011f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F55 10292 bytes
SHA-256: 1e4865735119a015be099037b1a1282e6e6df1a340e955d054405a5dfe106b0b
font_02_sfnt_off000136a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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