Malicious PDF — malware analysis report

Static analysis result for SHA-256 19be93f86836d782…

MALICIOUS

PDF

61.3 KB Created: 2021-05-07 06:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e97979cca454792d50e1da824984a0a9 SHA-1: 4708da5b968d49e9a68c156e18262a29087976c0 SHA-256: 19be93f86836d782a04732b108eaf12e1582cf6d2e30e02b78699c1fcaf88860
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on compromised WordPress sites. These linked files are likely designed to further a phishing campaign or deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/rhnh5fq354i0h1jcm76hn5egld/85470795431.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/262049256314be2324f1defcb7b1071b/46611152923.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b6fba6d6e9a491e785117f73c7559d48/31714353488.pdf
    • http://alemotta.com/resources/original/file/41192107069.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607831e7d1d2e---34833669323.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/20d7100bde573fef30eb107a7cfcb303/17104540174.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5b3144c37---87554748261.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d94ca70a8b---jorifupuwufet.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/cc4e85647872250567dc98b8c913e25b/jepituxosevidopireditovo.pdf
    • https://annjulieskarpmo.com/userfiles/file/wudulipuzire.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608effcb92d8f---36782538833.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/fe3e4d021019a7aefebf15691a3c0c85/nidexig.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608477f5dbcca---6702319500.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/bcdc2bec5755404395a0a6c0c2c660ee/zawon.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/3to57guu3o1pd0kc7mpqe16nt0/mafenelorataralowerixate.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=easy+paraphrasing+exercises+with+answers+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccad.bin
7be133aee0856629c86680a752a3845687a10b36bfd3765de9b6ff64ad40cfa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAD 5604 bytes

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