Malicious PDF — malware analysis report

Static analysis result for SHA-256 f470f662fcd5e109…

MALICIOUS

PDF

62.3 KB Created: 2021-09-25 00:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 05ec8ffef8cde569cc129a0f48a571e4 SHA-1: 3cb5260a55ef468a9061e60b4ac9a07c03a546d4 SHA-256: f470f662fcd5e10977535f274d5f5b42425cbcc4456315e449c8309306d21434
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5578

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 http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/33269726893.pdf In PDF document text
    • https://coil.hk/upload/files/62103117843.pdfIn PDF document text
    • https://htchninc.com/d/files/nopefumosad.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/72617694916.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/9224127366.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/fufokeda.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/xegazabeposuwazuj.pdfIn PDF document text
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/xepojegixug.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/kedanukigelapixef.pdfIn PDF document text
    • http://www.bash.cl/media/file/86222236781.pdfIn PDF document text
    • https://alemarferries.alemarsnp.gr/ckfinder/userfiles/files/66112025973.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/56130324334.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/49537369695.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sewozutu.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/23595983574.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/nosusudaluk.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/fobewotike.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/ladolij.pdfIn PDF document text
    • https://terracell.info/images/file/jididebamigadasogubomave.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/namuxi.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/12650208782.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/54826979899.pdfIn PDF document text
    • http://packamate.com/userfiles/gapotamefu.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/zexinifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mr+nobody+full+movie+onlinePDF link annotation
    • 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_off0000b195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB195 16036 bytes
SHA-256: f700af0d7ee4ca465e601fbc8792e9491e3f07288ada320eed3c1c863daa6eab
font_01_sfnt_off0000da30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA30 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0

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