Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ba79ae347bafd6…

MALICIOUS

PDF

98.0 KB Created: 2021-08-03 11:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 58bcd6a89d54debb024f881613ebdc21 SHA-1: cd0b8136a0381710a710b48dc05966087140771f SHA-256: 01ba79ae347bafd698dba7ff051cfeacba1c4186899b962263bd1fd331d3c8d3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of JavaScript suggests an attempt to execute malicious code or further obfuscate the redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://m-co.de/wp-content/plugins/super-forms/uploads/php/files/imisgrbcogm4gsi4qhgkcvjr4h/18641976479.pdf In PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e5583eade5a94507957cb720f795431b/44647399561.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/pasodupekavelovajiw.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/gotop.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/17166154420.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/29137990430.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/92262944593.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/87981616659.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/63c8264ff2c8bd1209b623ef66642a09/lunumitagenalanarufumabux.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607a75fb8a985---jifisa.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/rapenovufekupapisejudetak.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/qe00r6nr41l1scco931e5g8pgo/vizakusebowewadafewo.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/8438067677.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/f8bb76357edde2f87fe418bbc208390a/47763330319.pdfIn PDF document text
    • http://gibisch.biz/files/files/keposunazosupeli.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/92980781125.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d009a9d144---gevowufinofodavabe.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d511f37ac06---98513372071.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/7b5a249b0701f140c0781580117fe3b3/82735971375.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160fac98155b3a---medixoweledavuriranano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+design+cable+stayed+bridgePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCE 10876 bytes
SHA-256: 24da993f980e3b4b0d990807b1e5406f1b52da54dc98feb674288322bab84452
font_02_sfnt_off000148e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E2 19328 bytes
SHA-256: 6443437d0a0312d4d145ea6f279f87b1a9cdfa41862f3698f9b64648e8c61433