Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2c37066eb0846d…

MALICIOUS

PDF

74.9 KB Created: 2021-08-15 06:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d600ded5f9ed404d3bc63abe667fcb3f SHA-1: 8870bc98ef1b6b7a3d7655a9a1af4441f93e9d19 SHA-256: af2c37066eb0846d309351e5403c39bf67ffd72849dda445abc041235dffdd3d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to potentially malicious destinations. ClamAV detection and ML classification confirm its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7783

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://ldksolar-officialliquidation.com/userfiles/files/buleda.pdf In PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vivoroxaduruburide.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/1d998d46994a12e0bd3d0419def30682/nubafumel.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/befanibovivesekoro.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f494e2d03---57066520379.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/27955238261.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/90719091127.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/rafinasujitoramudifa.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/debuwobadedofakunasa.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9682f9793d---verajexaduwanirilibamuf.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3c544df82be595471242dc8228d2b8fd/xevifaravuve.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/00t9kluqimdcipt5qgn9nu73h1/bajitagapa.pdfIn PDF document text
    • https://tonitomov.com/picture/file/wakije.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071763612ab5---46599435332.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/0haja3poel7f8aaouenj1ne7d3/93449844623.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35b5a482b2---11519613162.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a552d44ea52---korarupuposi.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/pirugilotujosunoxopisir.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993377c2637---2289003739.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/72893029702.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff3d112480---pekamaferefegapisevux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=ayn+rand+la+virtud+del+egoismo+frasesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 10956 bytes
SHA-256: 2dc304356c89fb4f479a1c36475f06dff5a95605a69083baafc9079361388a5c
font_01_sfnt_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 17620 bytes
SHA-256: fece21cdc802de43eeed453d482f82151fb269c267117f8a8cc5a7e308954157

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