Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6131ea5fe0d2fce…

MALICIOUS

PDF

89.2 KB Created: 2021-06-29 22:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7f28d249dfb2ccccfdc5d470c5a3bb79 SHA-1: f967e0ff6712598b7e13cf6354ecae6fc6ae4fb5 SHA-256: b6131ea5fe0d2fce663844c9e849b4ce6202e5df9139085fb9e72fac64ce1fdc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content. The presence of a 'download' lure reinforces this phishing-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://louvre.lv/res/wysiwyg/file/78851871801.pdf In PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16081aa078687e---mupugav.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/c5f5c777282112426f52915a99048a9e/31143760503.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/puv619q2dvahkv4t1lvmat3ikq/99954271902.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/fnvqc3b4elcs1spqifnag0h3c7/91223519788.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/39f85dcd04c4a1e3e3e460d1bf9118d5/fibuvidimop.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8e7d47549---kojujanebalirixa.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/13a8ed9a775c9c17e901bb990b297c1f/54498978163.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/p6sm6pcq750gobpkil5o6jr2r4/16300833576.pdfIn PDF document text
    • http://qca.ch/userfiles/file/81985815034.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d6e3adc44c77939bca3a4150d4336db1/kivaxolijuneganoxelod.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/7f99e39c6377dfbf3a27b64da63b752e/40462358856.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2bi00fkkfu2pisthm3gqim56b4/dabazatisukirixokul.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16090ef3babf92---rowipalojenabo.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/edae62017b59ce625a425771ce963ff9/57065919015.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac03f6c033---mewexekowotivawevutakopi.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/26692823644.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/9add59097b7e03516bc5f921e0ce24a4/pevejizopujulefibukod.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16241204076569.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/7686dc14d602312072db03747092b5bb/83493124940.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/wosegijetomexenuxeluva.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/melipokezaralufigek.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/d6acd2e8b1e748c6c0001043d759ab3f/karaluwowodunipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=download+reality+high+full+moviePDF 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_off0000f967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001117e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117E 11000 bytes
SHA-256: 6b42f2e2b45e2596735b5e12820f49c0d1e56127bc783dc3e5b50dd94922f130
font_02_sfnt_off00012aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAA 17252 bytes
SHA-256: ed031f5d33381b210c424b5a4811201b5b47553cf171efddd95c3f76b64abbfd