Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ccc226b2f314e4…

MALICIOUS

PDF

72.9 KB Created: 2021-10-01 08:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: de74e7b05e31be49fc5c8da05454ae4c SHA-1: d19a3774e03bd938a5aeb6221c1d32cfde92a0b2 SHA-256: b0ccc226b2f314e4daab36e15aec69af2aed596b8e3ab7f2fb834b27822bcd3b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nomylo.ru/uplcv?utm_term=app+to+watch+live+tv+on+firestick PDF link annotation
    • http://taispacedesign.com/upload/files/xexoweliguxonelikir.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/timaf.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/jisinitavetimamuronebiper.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/winipivixekopa.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/favotevenimi.pdfIn PDF document text
    • http://greenld.com/userfiles/39098908948.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/79082725783.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/44358497204.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/45009681796.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fbfa1qq7p0a4nhuf5aftufgtp1/fefumomonarolupudetikim.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/18323742395.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/10187460094.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/605f0229f0d9aaf8b152d4534042d026/60154505969.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/mekoforuzupilozatofawive.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210909_07E34F311D164DDB.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/zogubozilavebududud.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/jolawasotevakig.pdfIn PDF document text
    • http://moscowcharm.com/content/xuploadimages/file/vovem.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/32335049202.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210925002418.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/6312943305.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/penesatu.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/80270861192.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_off0000b65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65A 10800 bytes
SHA-256: 3132e5e918da5c8bd72203ad7e0c8f00e3ed13a3aa6f3a119eb25160477a27a4
font_01_sfnt_off0000cf4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4E 18132 bytes
SHA-256: a6e1ef169edacb049eccf618dd773d791ab94076b3d41dd632e395c377ea04b3
font_02_sfnt_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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