Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0c1052b492f979…

MALICIOUS

PDF

95.5 KB Created: 2021-07-06 03:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f72af18b97354162e4835173b96edcf SHA-1: 6a5d268224e95b0e7ceaa9329e66e8b867f4bf67 SHA-256: eb0c1052b492f979fe9343515c2057e0371c654956bcdec5f221d16a32e5f210
156 Risk Score

Malware Insights

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

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal that the document functions as a link farm, directing users to multiple external URLs hosted on compromised CMS uploads and disposable domains. These links are likely intended to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://bodegaadrover.com/userfiles//imagenes/nubez.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788e06e6933---gefesok.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/vuvek.pdf
    • https://abofahed.com/userfiles/file/2918601653.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/23c1634a3fcec74174c2e9e9e056be10/tubal.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2707ddb519---27748395910.pdf
    • http://maszyny.pl/userfiles/file/xasevibulawiteboxateburiv.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099d383bef5b---67202220456.pdf
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/paliwigenat.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3fa9004ad---viwogef.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7t9fp7jp9t83tk202ucbafo3ve/vunakirokanirel.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc376b76df---paxipemejevivalugib.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/f55e0d657a5432740dde68472d6fbd7a/38276562626.pdf
    • https://vandolderskb.com/images/usr/58113409322.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wemizazuwiwidi.pdf
    • https://unique-u.biz/images/uploads/file/55768408305.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/b646063d19d8c25c78ee2fcb0b5c52b6/duxamawimenu.pdf
    • http://scandirent-new.ru/uploads/assets/file/buzezen.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160af8a1ccc5dd---78521335489.pdf
    • http://global-insurance-broker.de/downloads/wusonuvemujewagivexi.pdf
    • http://chikatere.com/Upload/files/pobipasafu.pdf
    • http://huntland.hu/upload/file/70659872058.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fe0824e9e---genorulopefezekorek.pdf
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/23386699008.pdf
    • http://alexhoffordphotography.com/temp/files/file/78687564309.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609737cf66748---zusajozasumepudagofazol.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/4c74c03adfd4e46a7326ee64ab998df5/tukexopozu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=hook+and+tinkerbell
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFD 16792 bytes
font_01_sfnt_off0001150e.bin
0386a1c13e6e24afeae3a6e9ab8ec32f3cbcd5598a0e2bd3099080bd2aaca191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1150E 16296 bytes
font_02_sfnt_off00012b05.bin
9c3c507e46e85515407b3852435a1f688c8029d2f926a5789c6d5abf6c6a003e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B05 17580 bytes
font_03_sfnt_off00015902.bin
c02bfce05ed5074b20a4d43dce0240301c4807eb62ac44e2c42178d7c0750970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15902 10296 bytes

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