Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6c1e0405268d78…

MALICIOUS

PDF

70.6 KB Created: 2021-09-01 09:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 865ee92b43f154027e16801b47871034 SHA-1: e2c8a4cd7cc7ef70fe958fd8f92226c347bf7320 SHA-256: ce6c1e0405268d7885472db50c1ee184e029c6f600c04327fa9d8975cf310c0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common tactic to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9156

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee32e2a5ca---nuxesomitedupurakorosola.pdf
    • https://ngusacdon.com/upload/files/47144398844.pdf
    • http://nktrading.qa/file/files/46440518161.pdf
    • http://weberstellen.ch/userfiles/file/wisojenozerifuvuvu.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/f1abf796b746b95717c7d4b75dac1a11/pideluji.pdf
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/jexabamize.pdf
    • http://agriturismocorteerbatici.it/userfiles/files/jumexulexes.pdf
    • https://grupo-kayros.com/userfiles/file/tiremakamupenuzorubirezub.pdf
    • http://bacsiha.com/public/ckfinder/userfiles/files/vajupivu.pdf
    • http://www.tramag.pl/upload/file/97435571841.pdf
    • http://mariopresto.pl/userfiles/file/figaxeluxurisivus.pdf
    • http://deltools.com/userfiles/file/81841332732.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/kv6m57aukf5ci9m2hh1nf0k323/pilexovevan.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c10dd3e2c---49004074380.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/k44hfh2d30e92h10qqdru5kbv9/14988659475.pdf
    • http://asbu.net/uploads/FCK_files/file/warepuliseluxe.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/94712ceac9c55391281bb2103de195f6/bisevaga.pdf
    • https://dolaodong.com/userfiles/file/zozula.pdf
    • http://rapet.hu/files/51236568886.pdf
    • https://bititechnika.com/uploads/file/xavepimijodexeni.pdf
    • http://terezmisszio.eu/files/file/fimelujuparowinifufel.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d346b4b1693---jalulexonon.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae0d1477e3---xalitutofaj.pdf
    • http://color-gateway.com/userfiles/file/41553510927.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/3ef069a8a99c8942a5880144f7ac6651/rovininopokaberewenimanit.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=all+creatures+great+and+small+all+things+bright+and+beautiful
    • 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_off0000e717.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 16792 bytes

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