Malicious PDF — malware analysis report

Static analysis result for SHA-256 3949085a92fa9d30…

MALICIOUS

PDF

60.9 KB Created: 2021-09-28 03:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ed5bcb33f5765cf303b4f5c795d5fa9c SHA-1: 01fab99738b8c491d356f0f777c6fd8e77e55ef4 SHA-256: 3949085a92fa9d309d0f8d14de61c23156afd7da947dc608148d2998ab5c54da
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6644

Heuristics 4

  • 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
  • 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://smidgel.ru/uplcv?utm_term=map+maker+brawl+stars+apk PDF link annotation
    • http://syarmarka.ru/userfiles/files/49372545508.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/wesexejisekukiveso.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/40678735236.pdfIn PDF document text
    • http://kahasat.cz/data/file/xenataroguzuza.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/89844495599.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/95406649263.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/63980854691.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/popoturesabolun.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613acb1f851f6---bewudedopukuz.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210919030722.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/95365900058.pdfIn PDF document text
    • https://acmfashion.vn/uploads/files/xozipovabukefek.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/vuzegonujasofitojezoxo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b341692a4e---85700980084.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/87270039662.pdfIn PDF document text
    • http://stringladies.cz/userfiles/romatapogopoxetajowobuje.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/daxedonobabanusama.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/22896566161.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/fagaradugemememukusa.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/jekomogubavikukaga.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/dedubagisubiw.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/puxikamotiputedaxowexez.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/sumaba.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/24003068852.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles/imagenes/wufijibaxetorerukob.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC801 10408 bytes
SHA-256: 9e4573cc1f0fb614016a2904ef10a265845b3840dd0f775d0bd4743176473058