Malicious PDF — malware analysis report

Static analysis result for SHA-256 6879267f4154b7cd…

MALICIOUS

PDF

72.3 KB Created: 2021-09-15 11:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 78b2c1de639fcda1e046ce105a4cba74 SHA-1: 92d07532667af02a9ffffdb0ad1bb37982c2e61e SHA-256: 6879267f4154b7cd764c755db2b700c41e6116e7dd16d52fa7294c3f0e61bc53
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL patterns point to a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=popcorn+time+download+mac+2021 PDF link annotation
    • http://chornakorn-packing.com/ckfinder/userfiles/files/maxijuradifet.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/liwitajije.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/95481011463.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/31702797245.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/zelizije.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/22820235164.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/jujaware.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/kupaxikozipojitelewov.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136873e1e608---ruwupi.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/95261830142.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1631640738.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/4669368840.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/zojedafopikamiluwuzazip.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/81060849485.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/59391003320.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/1310487564.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/febenokizapexogevigejudi.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/15f02a2592e3cdcfadba601c54fad582/naxixunumeji.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/49586605097.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/nenofiwixawakijelejataf.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/81598023256.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210906085155.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/mawexepanakumufen.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/mowove.pdfIn PDF document text
    • 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_off0000b8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CC 16236 bytes
SHA-256: eb172d7f73b0bc203e260ec0cf775ad410af96096fb12abec20f018b1a9d53b3
font_02_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 10888 bytes
SHA-256: 9123b54e66b96cc6098c46ee5d5cc6828a96ad0817cf8355c70cf1cedebe25fe