Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e30b6acefe52342…

MALICIOUS

PDF

78.6 KB Created: 2021-08-23 18:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ac840b5b548d0ae535e576872e4a26f6 SHA-1: 6d769e810716ad6ece8a842033978880b8a9efb4 SHA-256: 3e30b6acefe523421c58e6e0950f057b8f81005a5cfb41d9016849fac6b491b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous potentially compromised or disposable domains. The presence of multiple embedded URLs, many pointing to unknown or suspicious hosts, supports the conclusion that this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://autodilykanka.cz/cmsimple/images/file/99609561569.pdf In PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/27431583357.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/11679332357.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/tepokem.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/4518b6be77265bd727242893f73e9e3c/40667533648.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608414c17af24---dumuwusoxivufafisub.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e28cd2efd5---68940596108.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/wokeruwabawuronagokeza.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/zozazolasakopovorulixed.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/82032887904.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc593e90fa---88469157240.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2d9660ca1---64167391166.pdfIn PDF document text
    • http://slsnn.ru/content/files/8229278530.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d585a852c4---46011724431.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/99139415055.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/zekomen.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/50738925108.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/63056379447.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0cff3286e4823b31a4a14b0e1f0c6fd5/notutezuwoz.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078657795ac0---79231633839.pdfIn PDF document text
    • http://modern-pro.ru/files/file/51869237897.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2045e741ba---75374531366.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933df809aed---jalawetokemigigem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=would+you+think+of+mePDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 10488 bytes
SHA-256: 4ea080fd763e5fb62394a8145a09343456953a8d22178343b6a608b6e8d3805a
font_02_sfnt_off0000fe40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE40 16904 bytes
SHA-256: 7b08b01d1828f078fce445d337802971476e7392ae91b409f3ccf9a6cff4e42f

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