Malicious PDF — malware analysis report

Static analysis result for SHA-256 69538770f9c88c0a…

MALICIOUS

PDF

63.8 KB Created: 2021-09-08 14:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec0cc77703dfee292d4d6002d90bc2ea SHA-1: 88567ff41226902572f3a1ee0bfe22c81ea42515 SHA-256: 69538770f9c88c0a0652fe29c0eea0cd03915740de3183f02fda83dfebc047b9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with a high-confidence heuristic flagging it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's used to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6298

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://www.coverseg.com/uploads/ckfinder/files/51770653296.pdf
    • https://tckontrola.hr/files/68697671025.pdf
    • http://thewellmanteam.com/userfiles/files/3168505325.pdf
    • https://peterdegendt.be/file/vaxuxinowulobima.pdf
    • http://caythuocnam.org/images/files/litikobutekud.pdf
    • http://havefuntogether.com/image/upload/File/doxobuwujutebitu.pdf
    • https://bdata.vn/upload/files/wevuwemezuju.pdf
    • http://synhbio.com/upload/files/88525805961.pdf
    • http://toroisg.com/public/images/files/rebapalagujezej.pdf
    • http://vidol.nl/userfiles/file/72132373828.pdf
    • http://www.yoko-ono.be/images/userfiles/file/23605928653.pdf
    • https://tonerihned.cz/userfiles/file/jupakevutumedelafa.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zirovuxesetexukowa.pdf
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/kafaponesosuzufaku.pdf
    • http://kargo-box.com/uploads/files/72323124700.pdf
    • https://hopadive.cz/ckfinder/userfiles/files/88131438485.pdf
    • https://galedo.cz/www/data/cms_files/files/49911243124.pdf
    • http://sumisaedu.com/FileData/ckfinder/files/20210903_F8ACF3FA33719EDA.pdf
    • http://geomanteia.com/userfiles/files/lamowedipupabaxurogidani.pdf
    • http://printrun.nl/userfiles/files/75810077830.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f8aildeiupu6q0fnpdpnt7qdo7/42028665312.pdf
    • http://www.cerathai.com/image/upload/File/30564532998.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pdf+to+jpg+software+free+online
    • 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_off0000c76c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC76C 16792 bytes
font_01_sfnt_off0000df83.bin
34466fa25d7906209c5777a807d6aebaaf4a301d267fbe06d1ffc26462fded8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 10892 bytes