Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae276e2f0ab49d44…

MALICIOUS

PDF

67.9 KB Created: 2021-09-29 02:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9949418acf4e0e34a059d25be4773dbb SHA-1: e296d28583f26616bbc94c052d411712c1274145 SHA-256: ae276e2f0ab49d44b21672a3a2967f1c5b9d288f5a14073ed73bbea1fb416a82
114 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and exhibits characteristics of a link farm, with numerous external URIs pointing to various domains. The presence of multiple external URLs, including one directly using an IP address, suggests an attempt to redirect users to potentially malicious sites for phishing or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nomylo.ru/uplcv?utm_term=la+danza+de+la+muerte+stephen+king+pdf
    • https://dancleland.com/img/upload/file/nawimowisigawisen.pdf
    • https://xn--z4qq44i.tw/upload/actfiles/35307338669.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e3aaf702c04a3723b82532a122ebd1a1/54905799442.pdf
    • http://miroslaws.com/ckfinder/userfiles/files/11146618526.pdf
    • https://hoangphatdanang.com/uploads/image/files/88691386598.pdf
    • https://sunrisemotelbellevue.com/nbloom/fckuploads/file/90117698273.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139272e08a93---radow.pdf
    • http://intertexmedical.com/userfiles/files/16349414351.pdf
    • http://aucoindeshalles.fr/menu/file/vukedenenuwa.pdf
    • http://ilkconstruction.com/Images/Media/files/jipakowumuxiranamiwu.pdf
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/31007506149.pdf
    • https://floridagreatescape.com/media/file/24364920956.pdf
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/13719240460.pdf
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/51055556706.pdf
    • https://ispartaprefabrik.com/ckfinder/upload/files/walesi.pdf
    • http://yao-cheng.com/uploadfiles/20210925004246.pdf
    • http://camberwelltaxi.com/survey/userfiles/files/37787587474.pdf
    • http://zatacorp.com/upload/files/5490513683.pdf
    • http://daglichtfilters.nl/ckfinder/userfiles/files/wawibover.pdf
    • https://stiff.pl/ckfinder/userfiles/files/kugowopavigolela.pdf
    • https://tanhaithanhvalves.com/quangcao/admin/file/wafosorikekamerugusironuj.pdf
    • http://imhkayseri.com/resimler/files/30273077238.pdf
    • http://bdpq.hungminhits.com/files/uploaded/files/ninexulalotisarumepeja.pdf
    • http://chnli.tw/CKEdit/upload/files/nufobofetexinap.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BA 16792 bytes
font_01_sfnt_off0000dacc.bin
4e371d5c9fb1ad1dbe435fa3970d697200928a8585430e856984f78ce37d0413		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDACC 20420 bytes

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