Malicious PDF — malware analysis report

Static analysis result for SHA-256 f402414742ba1f0f…

MALICIOUS

PDF

77.6 KB Created: 2021-08-11 19:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 362f3086528f49542b90e6a57c8d43b0 SHA-1: 46c60b07c6fbbf03dc9f62430898c556da9e9a18 SHA-256: f402414742ba1f0f06200a6d72bfbac4b8fa313cd5005508896aaa7c58772926
154 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple compromised WordPress upload directories and other potentially malicious sites. The embedded URLs and the nature of the heuristics strongly suggest this PDF is designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

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 http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160fddd7d43cdf---folimular.pdf In PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c3993088c78---zazefotubikiwa.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1f881c15d---kupaxuxobusumigo.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb0b371eb---rominitajuleri.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dc740eb51758a5c394e7d5a3604e7f59/87354663862.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4c3dacea4---legutopej.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/12045121410.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/29342451656.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/95090698206.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/383ce862afd41d3e184f596cdb8e89ba/wazis.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c95d5096ded45f08d79b111514943c4a/jepekusovizarokaluda.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/78805559577.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/23c628e4230f33025df9b251fc7763f8/48222766858.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/67416299148.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/pawaxerepurid.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/19781336929.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60496d33b8---43552208264.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/98326517382.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/9baadfeffc6c8996a7babd953286850f/92897526344.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3bd314b4564b95ce7c33400f0be10e20/88262775996.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6aa22152b---64282966858.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/5q4u5ah9ogpc4v0lfbmb0b54gv/22973239957.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/2463482115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=investigacion+criminalistica+en+hechos+de+arma+de+fuegoPDF 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_off0000f6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 11040 bytes
SHA-256: a7307b8319571aacc6ee0f504f310d8c2fe458e177a5cfc615bbffce99b7ad50
font_01_sfnt_off00011024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1