Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f173727038a51ee…

MALICIOUS

PDF

84.5 KB Created: 2021-09-02 13:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ffe2cea81a8b7354fa3a0c101471c84a SHA-1: 748de36f81d220bddcfd95c90d22b5ba2361502b SHA-256: 9f173727038a51ee863ddd16ce35050a62e190fa1da36a81f29e2ca55337511b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with the signature 'Pdf.Phishing.Trojan'. Static analysis reveals it functions as a link farm, embedding numerous URLs that point to compromised CMS uploads and disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2574

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gocreate.termall.pl/upload/fck/file/46550565555.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becbb2be759---37523623082.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce7c5ac52---saxukawoseduka.pdf
    • https://samsunyapi.com/userfiles/files/saloganibaji.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc75b11998---labobejozebubowigekavoki.pdf
    • https://sanidom.pl/img/file/dizuxalu.pdf
    • http://jkbprivateiti.com/userfiles/file/mufefunoraza.pdf
    • https://getracemirates.com/userfiles/files/86234430671.pdf
    • http://gewald.ru/content/Files/wolevimadija.pdf
    • http://chineseclothingonline.net/File/kisivutilipuzoveba.pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wofifitutonalirovizevaj.pdf
    • http://sntaviator.ru/ckfinder/userfiles/files/50816929777.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1c5cdf4d05ffbaacccc6febee3021e41/xarigufiwuwemukewimadox.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec1f8dbf94---80496030154.pdf
    • http://nickels.design/ckfinder/userfiles/files/zoxitimuzofoxonewizal.pdf
    • https://balajihighfields.in/userfiles/file/48891021321.pdf
    • http://talentpetroleum.com/userfiles/file/90740675586.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160befb6bbc759---lufidepoxagiju.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f4a1eb0a---xugiwamatuxu.pdf
    • http://shinies.ru/img/lib/file/74252217797.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kmj161gge4c9ijuovcf0vli9g2/lutuj.pdf
    • https://dbmotorbrokers.com/userfiles/file/vesugonuk.pdf
    • http://fogathajtohirek.hu/fckfiles/file/tunorag.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/putasowepidifolugokagek.pdf
    • https://markyatirim.com/resimler/files/35138057271.pdf
    • http://tatishev.ru/admin/ckfinder/userfiles/files/nenovi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=frankfurt+train+station+map+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b5.bin
a5903c2954094d288256bfa3b2ed1bb44e0c550772e40f11005ec43b0ee9944a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 18916 bytes
font_01_sfnt_off000125e5.bin
15915f0c46e8ff68b1ac943aff01ca6b37e4e660526470d8dcc595f1c567e4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125E5 10652 bytes
font_02_sfnt_off00013e3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3E 16792 bytes

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