Malicious PDF — malware analysis report

Static analysis result for SHA-256 efaeb5b0fc5d741e…

MALICIOUS

PDF

81.8 KB Created: 2021-07-29 14:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 846540c423b8e531d8ad423997935568 SHA-1: f2d0b4645d0c170d0e90085d8d8737a47ab0fef8 SHA-256: efaeb5b0fc5d741e19b2f70c385a1dd856754b9843957b74002c3b17bfb2bff6
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of these links suggests an attempt to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5399

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 https://garglob.ru/uplcv?utm_term=demarrage+d%27un+moteur+asynchrone+triphas%C3%A9+en+monophas%C3%A9+pdf PDF link annotation
    • http://mlsconsulting.net/cms/files/File/pelukijajo.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/metosekeken.pdfIn PDF document text
    • https://dineflon.com//files/repawuvuluniwudure.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/guwusuxuleperodidug.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/41756638871.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c792db6c2---mojuxosefuzipikezologabuv.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/2144dcc7f9ae01572b0bf1aa2d7aa6d5/vikisupe.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/7c37df5c5ca1cab1da842cc089213c31/kavuximotinada.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c7533089c---xosetedamojivosenonawemev.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/34557783339.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/vuxibaxogujamotavud.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/77163267861.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82e7c1f642---52526918744.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606efda0d152f---80684332769.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/megetikanuxisu.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a9ab209d09e6b115b972163e4e511ef/zadowikejeradevijot.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210722042309.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16085511f83f9a---56365769170.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1622172498733984846.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/jabipebopunivu.pdfIn PDF document text
    • http://keacg.com/upload/files/jebubixifapum.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/cf5a1b59d33cb944de23f4ed8de7acdc/74486325458.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/98454230981.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/mafukuzegupimidivozis.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d7689565345---rurilirufopilawazijutej.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca86d4e979---9921057256.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE933 11424 bytes
SHA-256: 3007e6d16cfcd11ec3f43501fc4d94e41d2acfc8bba83e23fa57efb9f3745852
font_01_sfnt_off0001038d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 21268 bytes
SHA-256: 441c8e43850958843c9ec8b23a5e072af6803f5bc0161b4629bd1de5d1556cbe