Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab0208bc9d08f1b…

MALICIOUS

PDF

69.1 KB Created: 2021-09-28 06:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6440d7072428d2b5dc7b38fe029729ad SHA-1: 595b4155b32041995a1b7fcda1d1a013a1712b8b SHA-256: bab0208bc9d08f1b07a0f1bc963ca0905f9f376f1e48ceec67be6a08d7b097ac
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 embedded URLs, many of which point to disposable hosting and appear to be part of a link farm designed to redirect users. The presence of these URLs suggests the document's primary purpose is to facilitate phishing or malware distribution by directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pixomot.ru/uplcv?utm_term=how+to+send+a+movie+from+android+to+iphone
    • http://camonetinternational.com/files/file/20453005440.pdf
    • https://rimsball.com/ckfinder/userfiles/files/kaxewipinunibonejani.pdf
    • http://ormansagszive.hu/upload/file/49973038837.pdf
    • http://fantasymusic.it/userfiles/files/30760238850.pdf
    • http://ubestsports.com/imager/files/20210921035549.pdf
    • https://watertorens.nl/userfiles/file/vizefaduxegopagaw.pdf
    • http://kokocurry.gm/userfiles/file/nisapawogen.pdf
    • http://podlahypilat.cz/admin/file/verebidok.pdf
    • http://kelakewangshangduchang.a9188.com/upload_files/art_files/files/20210916_192323.pdf
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/gelidufoxekejabixivigujef.pdf
    • https://www.terraton.com.my/ckfinder/userfiles/files/lofeselowimatufibejofike.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379f5ecc86f---ludazuzobinoxa.pdf
    • https://holocaustresearch.pl/nowy/photo/file/88198696228.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c17b67aa61---xulabikopazowitebarul.pdf
    • http://nj-rshb.com/v15/Upload/file/2021962049345114.pdf
    • http://bukharaalpharetta.com/sites/default/files/file/senexozu.pdf
    • http://schodylux.pl/userfiles/file/90512512903.pdf
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/31647441135.pdf
    • http://pnktools-th.org/ckfinder/userfiles/files/pubagosenonajab.pdf
    • http://servmed.net/userfiles/file/wozidizevelam.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_off0000ac6f.bin
c14eb01284649a3b49dd1c31a78b88b5e55024a1205972c4456f012103646e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6F 16436 bytes
font_01_sfnt_off0000d626.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD626 16792 bytes
font_02_sfnt_off0000ee3d.bin
7207c511b769d7f09a60a817d59bd51505c9ee0082710edc285b4c2ccf0ef7e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 10860 bytes

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