Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0a2d4d1d964237…

MALICIOUS

PDF

74.8 KB Created: 2021-09-13 05:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 928343d430fe789a5827832217ef8251 SHA-1: 7af5b9495b2a767eec21be7e0feaa409cd7b924d SHA-256: bb0a2d4d1d9642376209228e19f1b3be9121ff60d6c983689f7e388867c1b8ed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URIs and embedded URLs pointing to disposable domains, indicating a link farm or redirection mechanism. The presence of these links suggests the PDF is intended to redirect users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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=how+to+post+a+game+on+play+store PDF link annotation
    • http://aallergy.netlovestories.com/upload/files/zupojezirekebivanilige.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/44086865593.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/jobiku.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/88197337620.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/zovogelakijop.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/51328665101.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/20444988572.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/zixodiwimadewu.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/41582420663.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/sovataniwugiwuv.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/80237500039.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ea7fe8119---rinasedapunudux.pdfIn PDF document text
    • https://goodline.by/userfiles/file/59393553973.pdfIn PDF document text
    • http://zhongyuemedia.com/filespath/files/20210910190619.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/40219661842.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/dozipewulekoxobetirilozes.pdfIn PDF document text
    • http://underbutter.cz/download/foto/17191811778.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/31041521834.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/talurezarilunep.pdfIn PDF document text
    • http://chikatere.com/Upload/files/nefadidasoderudefizebat.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/19234034759.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/momideladotadavelokatakar.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_off0000c0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EF 17144 bytes
SHA-256: 35ff64e104d4f3f869736d9bdf138ebf4edfb37381545e625fbe35e1603183eb
font_01_sfnt_off0000eced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECED 10696 bytes
SHA-256: 22fb74f5760ad410f2347a2e82699b3694ad8368556927ab564b0beba9da0f72
font_02_sfnt_off0001058d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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