Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f061d13c7b62342…

MALICIOUS

PDF

70.3 KB Created: 2021-09-23 10:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21ff1eb3c6009a92d7d0a05883ace664 SHA-1: 2c06b0b1c643e060805a2004938b1cdf9b706388 SHA-256: 6f061d13c7b623421e12b41371528b1897f2fd864f90bce24de7d0f6dc8328c0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers also indicated maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were extracted, the structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7457

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/jd47at0fejaui9i9mlfmpomk2h/xujegipagive.pdf
    • http://emanuelarombiarchitetto.eu/userfiles/files/97882793782.pdf
    • http://wmsone.com/eimages/file/63935828914.pdf
    • https://pankajplast.com/ckfinder/userfiles/files/benogibutetabunapuwagoma.pdf
    • http://m-camper.ru/ckfinder/userfiles/files/dajivilonunisenorikarodu.pdf
    • http://krallarintavugu.com/upload/file/xoberapegarugulidek.pdf
    • http://jocoseatee.com/userfiles/files/nerorurijopuxokobigagatul.pdf
    • http://daivupaint.com/img-chamthi/files/17940534963.pdf
    • http://royalgoodviewresort.com/Uploads/file/66017360819.pdf
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/wobixunuleg.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/bokigoj.pdf
    • http://konstruktor33.ru/app/webroot/files/files/82588229608.pdf
    • http://delve-cr.com/uploads/pezariviriduxitegipak.pdf
    • http://diagnosticaedilizia.com/userfiles/files/30207828862.pdf
    • http://vektor-bezpeki.com/userfiles/files/83653686268.pdf
    • http://casauthienan.com/fckeditor/editor/filemanager/connectors/php/temp/file/18711230958.pdf
    • https://www.iieng.org/editor/ckfinder/userfiles/files/6500799356.pdf
    • http://centonze-vini.com/userfiles/files/30357620476.pdf
    • http://1night2daytour.com/ckupload/files/56581790898.pdf
    • http://zjbfjt.com/upload/files/26503579782.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/0b0d67a4707e44188fb96980a096418f/dotutejazijexosap.pdf
    • http://www.chp.pl/ckfinder/userfiles/files/gafovuliwer.pdf
    • http://elmbbq.com/uploads/files/10092856037.pdf
    • https://resonanceacteurs.nl/userfiles/file/22479721649.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=x+ray+client+minecraft
    • 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_off0000edbe.bin
6f9ccae44978128fe673acf2312c80910082abf0626c5b952bf609f065593395		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 10332 bytes
font_01_sfnt_off000104fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 16792 bytes

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