Malicious PDF — malware analysis report

Static analysis result for SHA-256 002e6cba0a49c01a…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 15:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01e36898665caaa78951841e3976180c SHA-1: 3c0cb61b11a5f0b38d06c4ac7bc8b01d0a94b2cf SHA-256: 002e6cba0a49c01ab0353f97f8bcab85f3c6771153e69c9854a96502267bff91
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://queure.ru/uplcv?utm_term=mustang+gold+slot
    • http://prmakeup.com/Image/files/34527970493.pdf
    • http://ekorepetycje.eu/Upload/file/65415077116.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130258181be0---gisapetazukarubise.pdf
    • http://cioccolatogallucci.it/userfiles/file/falesizupojudanugupututi.pdf
    • http://bjsddesign.com/filespath/files/20210902003537.pdf
    • http://cmuniontravel.com/userfiles/files/27785316503.pdf
    • http://benthanhsgfarm.com/images/uploads/files/31547761208.pdf
    • https://igruppe.no/ckfinder/userfiles/files/raxukuseferonizuka.pdf
    • http://ttfi.org/app/webroot/userfiles/file/mavafunoxidekef.pdf
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/xavipatujawemavidiviwew.pdf
    • https://shindah.com/images/ckeditor_img/files/35877611016.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414a6397b9e---sowomopow.pdf
    • http://dalieuht.com/app/webroot/uploads/files/goxabinoduz.pdf
    • http://reguitti-engineering.it/userfiles/files/timukojomila.pdf
    • http://kingcraftviet.com/uploads/ckfinder/files/wunukutuguru.pdf
    • http://finpacecuador.com/userfiles/file/tezodalipudopetuf.pdf
    • https://sentinels.ro/userfiles/file/pilodogitirenutewaxuwi.pdf
    • http://bodybybodyology.com/ckfinder/userfiles/files/19525083146.pdf
    • https://taumed.kz/upload/2021/09files/2109041613197343993l47h.pdf
    • http://ancient-theater.gr/media/file/44158732659.pdf
    • https://tiguan-wiki.ru/file/18302565877.pdf
    • https://groupunsur4.com/contents/files/xapuj.pdf
    • https://adikkedua.com/contents/files/85084152489.pdf
    • http://xhzhengli.com/upload/66818547469.pdf
    • http://oralrem.kz/ckfinder/userfiles/files/78607929253.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_off0000d901.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD901 16792 bytes
font_01_sfnt_off0000f118.bin
9f6bf9396cfb38df46e10e7f73115396091f48c25d1f98d2cab5ee0f5722dd3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF118 10192 bytes
font_02_sfnt_off000107d4.bin
876897c7766124e78ed30a5fa016886f6c768f0a86a7eb555ef6ea223856dd8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D4 18648 bytes

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