Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c738e0defa8d85b…

MALICIOUS

PDF

74.8 KB Created: 2021-05-06 09:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c634ca4b87669670c6875e2baf7ada9 SHA-1: 15ea32d3cd290b18db1031e43317e09531ff1ecc SHA-256: 8c738e0defa8d85b8ab46e63f7bf97c1e311de5f2d36cf50106544f3c9f26afe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised websites, suggesting it is part of a link farm designed to distribute malware. The document body, though heavily obfuscated, appears to be a lure related to 'teacher resume template word doc', indicating a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8947

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 https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091090cb2b3e---92806000691.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879d6706127---gokex.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/nubul.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/61899c41d00e033285b1fc66a6e40428/71685684004.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/30a95a339ad4b98ee7e03e69e2a7f4f3/wekuzajefun.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c6363807e---xufokumarovegibanigapa.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9aeb610f5---gakofodezefasefejimekujed.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160813a1e91604---78706209353.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e09ff9ea56243792ead30ab8e4533280/dajifobatugojutuna.pdf
    • http://alnadaoil.com/userfiles/file/tanin.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/b1668781b31cdd174bd66eab54e7ac9a/18104941362.pdf
    • http://ahdongjiu.com/upload_fck/file/2021-4-30/20210430043113339419.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/tnmbrsu85jto5ridpshtp1lbdg/wesefomopawero.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aee854b6e2---dalejezetaxoxepujujepi.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d401113fcd---30742410316.pdf
    • https://loctra.net/userfiles/file/53873004785.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea04293cb0---rakilupufufobifaxobimew.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/ad7e67d091ae893651eea973835846a1/giremunetobom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=teacher+resume+template+word+doc
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010403.bin
ac595a30a02430c65918fb7dd64f28679c823add97f088c1e97d32bf757d762c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 5356 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.