Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c84694cdf1e29f3…

MALICIOUS

PDF

66.7 KB Created: 2021-05-13 00:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44367fb92b409929507cb4df4fdc11fd SHA-1: 5aa882ba7eb220eda028606415f83622192c0a70 SHA-256: 3c84694cdf1e29f35f36a2c00f6c5b816c79b4eeacb8363c76ccc08c8b24130f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites and disposable domains, likely intended to trick users into downloading malware, such as the 'abbyy finereader 12 sprint' driver mentioned in the document body. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8125

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://synerhu.ru/uplcv?utm_term=driver+abbyy+finereader+12+sprint
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/a7f97096ac7e02ef5e3c8ef787235c53/24332609510.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e165a8bff---85434678376.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a162aa0e13---rumavixaxelake.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f971242d6f4232b4e5caf2656859a9bf/97104260465.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f02c326c9afe43b473f1bc5e78a7a087/45200717206.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97d1734b2---42079131439.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907f42d7766---15329535471.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tmnt2k3g4npcq2o287peurs6q4/75600432905.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/lb8kfmmacd3q0bpvk82ltr4sr2/61119959683.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3ncmu9emja10qvrddgie3bq62d/rexibatilunopo.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/r5ldoi4dkh72e2559b5f8cea8o/80088044063.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16073e6a91b48e---68799246119.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16084da0b88308---93912819051.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/0jl4hrj9okir61ukigp19h7fqh/xaronerizukamanone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2db.bin
6e8b266798d849dd266761fddd9d5d33d9933e1f57b8e7b6844d7269e8612bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 5488 bytes

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