Malicious PDF — malware analysis report

Static analysis result for SHA-256 84eb1458a50c6fe0…

MALICIOUS

PDF

75.5 KB Created: 2021-05-10 04:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: df58ba7ad7fb8eb92fb804927aa48b1c SHA-1: 0f524ab45c76591558976aeb8dae740b4f4df329 SHA-256: 84eb1458a50c6fe0fc9ce17b13fa42b6c66b5b1c6eb0b72c22283692f8c9db09
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to cancelling subscriptions, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/8a0d3a45595a32e04739d5e64c184640/19220035591.pdf In PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/o155pf80hi7t901bgvfljp0u06/99980097144.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/g00runhq39k3l2bi9o57ji23ll/pawopelo.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/dc0d2d73a90c16bfc02cfc3b9a395b46/97082384883.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f2147014a---34164711937.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/6b84bef85db50ad06ee42a447803ea7c/fuvozarazafe.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/ea1af7957b815a5ac85debda6929c311/jojojunonagukuredasivelo.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ea6f57290d64e4d455282bed9d3151e0/litifonopepenis.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/tobirozalapusesufunopi.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/2f04963e7c10d7a7f50d90a492d6e6b9/64473630632.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/kuzasafupute.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607905ddce2b2---dasomiropipepotu.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/48vft4h5anomjf4nrq4f0d8vc4/bonajafukoxirafinimabip.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/2bb7044bbe4bdb265f5476c690df8895/30108388440.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a0513db3d---kotelumuxibuwodu.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fa76674e37d0ee19d32f4e1f52c2a27c/66833980622.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/dukikuraloluviro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cancel+apple+music+subscription+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 5264 bytes
SHA-256: 9cf07bb83af77fc2344fe7747a3806708f3b6aeeb326446319fd370072845b49
font_01_sfnt_off0000fb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 10800 bytes
SHA-256: 641edb135cad4c756f98262a3d134907efd9ddab948355637a6985f9aeb32aca