Malicious PDF — malware analysis report

Static analysis result for SHA-256 4187096ed846f068…

MALICIOUS

PDF

69.9 KB Created: 2021-09-25 15:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af79a4f289fd0b1a0eed0473fc42ce54 SHA-1: 96b444f4ea42e754db9344a7f09b68c000624c16 SHA-256: 4187096ed846f0683a3b52f5b11bf699d29a7802132afd1e6a704365cd9c2205
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially malicious websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://catamma.ru/uplcv?utm_term=watch+catch+me+if+you+can+online+123
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/91090024166.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6918612b2---84584537389.pdf
    • http://sakuragiramenandsushi.com/uploads/files/xenakeniwumamizufilazus.pdf
    • http://brlairport.com/images/file/54444276446.pdf
    • http://www.farmaciapenil.es/userfiles/files/87666598813.pdf
    • https://sts-cct.com/app/webroot/userfiles/files/30047856237.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/etbm5li53co0982qoqp323jhn1/7923006338.pdf
    • https://ifbscalidad.eus/files/galeria/files/28890109610.pdf
    • http://wecareprogram.org/images/file/tigumumalanaw.pdf
    • http://maremania.net/img_pagine/file/rerulan.pdf
    • http://tincorner.vn/uploads/files/96719469752.pdf
    • http://mexvp.com/ckfinder/userfiles/files/88412256585.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/nulapugojudo.pdf
    • http://microsolder.hu/userfiles/files/xuvinaged.pdf
    • http://jullien38.com/ressource/site-image/files/20752284180.pdf
    • https://ln80.cn/filespath/files/20210917042524.pdf
    • http://bud-drog.pl/userfiles/file/fufumasanena.pdf
    • https://syntellect.ru/Repository/file/15363697785.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/suwunas.pdf
    • https://twinscooking.nl/twins/userfiles/file/pixixukovisijexunidu.pdf
    • http://aow.infogestnet.it/ckfinder/userfiles/files/zifib.pdf
    • http://bioaec.com/userfiles/files/44154159503.pdf
    • http://ping-property.com/user_img/files/91021014468.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_off0000b197.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB197 16792 bytes
font_01_sfnt_off0000c9ae.bin
42194d4ae50daa095a8c116690a7dc4a5a977b022d2d3f421582ae56da692a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AE 10884 bytes
font_02_sfnt_off0000e2ce.bin
396f5f5a8d0f4f70ac9c2fd7b860f20e5c614a3652722b2a2d411cfddba0823c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CE 15676 bytes

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