Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c79b88b49ceb21…

MALICIOUS

PDF

58.5 KB Created: 2021-05-03 10:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc7b312def2f599e89622d47359d277b SHA-1: 4c067f0ae059f2af47af1a13f329c11bc8476bc8 SHA-256: 62c79b88b49ceb218e0eda42c91ef1c5b1196bceb9ea1862995bce5d4bd0f93a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'acrylic wifi professional free', indicating a lure to download potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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.plsok.com/wp-content/plugins/super-forms/uploads/php/files/0fd4d684c68d29dc9c0f0a1d71f74c07/xaposaxoseximutusupixuv.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073745448463---83739134615.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/66ac4a2546af6fea79c2239cf97975b8/63087843092.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dda49d8cd---76129342616.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1a39b1278---kidigonepovowu.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3e57ba542---mosuxutowokazijasigilo.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087101ca68be---gejurolobekugewuli.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607551281f088---28847990375.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50ca620aa---18754972364.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071111f60ea4---zemododezimofupom.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rqql2pqine7ljg8drlc686fmqf/89372938938.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607660824ab02---22538217876.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd8596f1d4---64331949676.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608311e3cc010---65572633849.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=acrylic+wifi+professional+free
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf57.bin
dbcc7e989a97f4910f7cc736208f466af84be9fcc4aa1c43841c210c8028cf08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF57 5192 bytes

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