Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9bf6e74abddc7d…

MALICIOUS

PDF

91.5 KB Created: 2021-08-03 07:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ababe57ec27ed7fc81bdc1fa4b23769d SHA-1: 761b771cfb79dcee2931bed6081a7817a82fa9f7 SHA-256: ee9bf6e74abddc7d442d0db2cb92dd9fc62ce12152ac226b56d17ac8b8f8eba7
154 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories, likely serving as a distribution point for further malicious content. The ML_NYX_PDF_MALICIOUS heuristic and ClamAV detection strongly suggest a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8559

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://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089c874293ea---1132656049.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/4511094009.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd5f5b2686---47646869371.pdf
    • http://darec.sk/files/files/3270358115.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608802d844fac---92178534273.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608777fde90bb---52896893464.pdf
    • http://pushgroup.lv/userfiles/files/bofovuxoma.pdf
    • http://liavanhaeringen.nl/userfiles/files/purotamevetikunava.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f689520d04---feximinerab.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6ad8e9e78409e3ff3f776f9381247245/56816372633.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/5e8eb6b8ec64d892e5feac532106ec35/28102199965.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/tbs7uhdg27qlmv2ja2bbogm03o/bofowixejuz.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c85162d8c67---zusutodapal.pdf
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/43885088792.pdf
    • http://washburnhs64.com/clients/f/f7/f75dc469904bb25755ea64d7551c4a95/File/sekabonikivaferagaratex.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfe15ac26---pakozigikagoxazif.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b0170960a---1818207419.pdf
    • http://vizugy.hu/uploads/files/kofozazegukozatavapu.pdf
    • https://mashura.co/userfiles/files/komowanolafunasanujixere.pdf
    • http://eprdel.cz/userfiles/file/zepefukaku.pdf
    • http://arkystudio.eu/userfiles/files/82790361532.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/95325c6edc9d64226314bda181fad071/95494362786.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sample+summary+of+ojt+narrative+report
    • 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_off0001317d.bin
8cc59c73c627ae572ad3ec31eb740f18aee0d7f616f2270dd885ddf32e3861b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1317D 11004 bytes

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