Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46732a316af9975…

MALICIOUS

PDF

93.3 KB Created: 2021-09-16 10:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f997000665391b38c15d8334962213b SHA-1: e0ea0dd6c9e254bb16e4017b8b92de6b399ba1f2 SHA-256: d46732a316af9975578a1fbf40da32b5582150290f274329ee8c1ceef2718022
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded content are consistent with phishing lures or attempts to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=il+miglior+lettore+musicale+android
    • https://parkettworld.com/upload/files/2763287764.pdf
    • http://adirondackseafood.com/ckfinder/userfiles/files/82915335492.pdf
    • http://paradisoseminatrici.it/userfiles/files/pinebebumafagerade.pdf
    • http://sudeoksa.net/userfiles/file/20210903160206.pdf
    • https://iphone-odklep.si/vsebina/nulagedapemerujiguboxo.pdf
    • http://lecieldesandes.fr/ckfinder/userfiles/files/24778975922.pdf
    • http://shijijiaming.net/filespath/files/20210904003015.pdf
    • https://my-natural-style.net/upload/files/jojimedurekulukev.pdf
    • http://dailymaydemtien.com/userfiles/files/riluvadijiwexe.pdf
    • http://kolkandkolkdesign.com/site/data/ws/files/45743756310.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f699c6a0da---nazuwepo.pdf
    • http://faisaltowel.com/survey/userfiles/files/tuduze.pdf
    • http://inistor.com/ufiles/files/viwebafuzazimonesavusin.pdf
    • https://elesud.it/img_pagine/file/vafagoxoziwiwaredamelig.pdf
    • http://hurtmar.pl/Upload/file/75695393183.pdf
    • https://sanmuabancongty.vn/images/content/files/jerafegumidisorulozejoj.pdf
    • https://dichvumoinoi.com/ckfinder/userfiles/files/40210527873.pdf
    • https://fceresources.com/ckfinder/userfiles/files/27621417021.pdf
    • https://faceless.me/userfiles/files/tevagaket.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4pd0ut1bpofipvlk5d64thtaar/nuregewimagavamevoroti.pdf
    • http://abwsalisbury.com/uploads/files/86699094425.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/d00d68493251f7511810237df3177ca5/kitusudinabefo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010730.bin
17a0a12e96b0c780d251248a9283b9de1b2524996c449acb70efcb94f8bc1cb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 17640 bytes
font_01_sfnt_off0001352e.bin
fbb7fc262c0addbbfb2507691be757fb958208ff44819578f2f24bb6d75e778b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1352E 10764 bytes
font_02_sfnt_off00014db4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB4 16792 bytes

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