Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0ba759efbe47ad…

MALICIOUS

PDF

70.0 KB Created: 2021-09-29 05:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c08564ba6a89ca5d45269feebbb2831 SHA-1: d82e287212fa6821844403cbbf0ce686dfda4f81 SHA-256: fe0ba759efbe47ad8e906b43fbbd143daf27bf06b4a86f15fd8d8241f9e037e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be disposable hosting. Heuristics indicate this is a link farm designed to distribute content, likely for phishing or malware. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

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://garglob.ru/uplcv?utm_term=login+and+registration+form+in+android+using+sharedpreferences PDF link annotation
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/32561829483.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/16289592357.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/23880307096.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///95949873198.pdfIn PDF document text
    • http://xueyuan.zlyxgw.com/uploads/ckeditor/files/20210929084658.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/91065924918.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/xupavezi.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/31900446702.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/fetel.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b7103a0b52---96530699465.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/wufujudugadurotegowenagol.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/mevutafanesotururovojufu.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/zimadike.pdfIn PDF document text
    • http://vidiniaibreketai.lt/userfiles/file/21328097027.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210919111506.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/xekazukitefebumorejasa.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370b56294ac---powiwekefudisotuzevo.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/59397695694.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/76461144405.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/zinuxi.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/33843356674.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/6064115492.pdfIn PDF document text
    • http://channelletterguide.com/ckfinder/userfiles/files/58000002198.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/72171493712.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_off0000b1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BA 15296 bytes
SHA-256: 1fa4aa8ebba2f60029d5b442d65d2ba93104a353cf0ee4e5abb85d4681ac3fa3
font_01_sfnt_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 11076 bytes
SHA-256: 761b87629eb481cd29cbcc111336d418e8cc7f24898368258dd62dcac3e35249
font_02_sfnt_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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