Malicious PDF — malware analysis report

Static analysis result for SHA-256 066eaffb11f00573…

MALICIOUS

PDF

82.3 KB Created: 2021-09-15 22:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23f3cddd47499c3cdb838be56311ba6f SHA-1: afdfc881bf81a618482d2d035bb63e0488e706e1 SHA-256: 066eaffb11f005736858ef2d851abde153374cdb8abab29fed5575cc14e4130f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to other PDFs hosted on various domains, suggesting a link farm designed to distribute malicious content. The `PDF_SEO_DISPOSABLE_LINK_FARM` heuristic further supports this, indicating a tactic to obscure the true malicious destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ryanoomen.nl/uploadimages/files/dosukarefizufuder.pdf
    • https://shoppingplanet.ro/ckfinder/userfiles/files/rizujes.pdf
    • http://paneldeconsos.com/userfiles/file/79341043062.pdf
    • https://marblobaths.com/app/webroot/img/files/87688975050.pdf
    • https://kermiradiatoriai.lt/images/files/14635664359.pdf
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/puxixivujamogunig.pdf
    • http://dulichtantai.com/files/uploaded/files/zexatizikixepowijir.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161307ce0bb309---44035285068.pdf
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/ravifiturefakamitegubux.pdf
    • http://yachtales.net/admin/userfiles/files/42175526611.pdf
    • https://habrit.tw/ckfinder/userfiles/files/xekobojojolovolunuxif.pdf
    • https://senesi-sklad.cz/userfiles/file/xegesorinivoj.pdf
    • http://abwingsva.com/uploads/files/93133862905.pdf
    • http://euro520.net/userfiles/file/16305512561166721720.pdf
    • http://koszyczarek.pl/userfiles/file/11003502073.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5a3f3a061---resulamujirubomagarinijix.pdf
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/59406401346.pdf
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/mekizisekemimozenu.pdf
    • http://interiorconsignments.com/media/file/boteretakugeburiwinize.pdf
    • http://tulga.ru/editor/files/sufimetiwagonosuvu.pdf
    • https://chungangroup.com/uploads/files/202109150858042170.pdf
    • http://aranysolyomfeszke.hu/editor_up/jezifolowowajibomepaz.pdf
    • http://rracc.com/file_media/file_image/file/nuditupujojase.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=download+su+binary+file+for+android
    • 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_off0000dbd7.bin
ae58669350f0602d084cb7a0eaa62a2acdde0ec277bff4833f4b30b46d6fb048		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 10688 bytes
font_01_sfnt_off0000f481.bin
e38bb9032f123a425951fa7310b816b7cb8b160e85ca5fda1385ce41f35921c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 17812 bytes
font_02_sfnt_off0001233c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233C 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.