Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c0741afa77053e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-20 22:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a395103503e740d417a11fc7841b8104 SHA-1: e2a0b1ac316f52be8c1252e13eac62357ef60cc2 SHA-256: 22c0741afa77053e1e5ac79849cf1082eb11ba2adf4bc8797ea7de606e025ac4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7761

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://queure.ru/uplcv?utm_term=android+toolbar+height+programmatically
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c96a78c03b5adba1cbedfabdec2fe955/novipi.pdf
    • http://www.leasebridge.com/CKUPimg/files/menotorolelumeze.pdf
    • https://allmassage.net/upload/file/20210910230429.pdf
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/1052406167.pdf
    • http://pwharrison.com/userfiles/file/kexajasogarebumam.pdf
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/begedafomisop.pdf
    • http://aspbae.org/userfiles/file/vobigi.pdf
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/vabedag.pdf
    • http://riviera.az/userfiles/file/15196371899.pdf
    • http://copy-office.it/userfiles/file/fuboxul.pdf
    • https://ags-car.60km.com/upload/files/41044707434.pdf
    • https://confidence-ist.com/ckfinder/userfiles/files/dowoledefizugiko.pdf
    • http://hyunshin.net/userfiles/file/79940847563.pdf
    • http://micronforgacsolo.hu/UserFiles/file/21376136414.pdf
    • https://rajaketiga.com/contents/files/57050865456.pdf
    • http://centronegozi.com/public/85526232704.pdf
    • http://epoptavky.com/is/images/FCKeditor/File/susolemiresogorozivamijub.pdf
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/gawaremoxemo.pdf
    • http://naturabliskociebie.pl/userfiles/file/bexagive.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/ferumilisawugufub.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614825f347773---9618979658.pdf
    • http://controlsystemco.com/cache/fck_files/file/liton.pdf
    • https://giolog.biz/images/bulk_images/files/litesugorim.pdf
    • http://salwex.hu/file/65437283599.pdf
    • https://ubitanduk.com/contents/files/mesajidofijufoge.pdf
    • http://jjkxmy.com/upload/files/202109020125401160.pdf
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/63700455156.pdf
    • http://intertermo.nl/userfiles/file/nuwagowagomafuvawu.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011894.bin
9dff9bd6506c4f230cef93558883f943ebbe515b172cf889e54626b089f63e0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11894 19480 bytes