Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63569b6f80b6667…

MALICIOUS

PDF

86.7 KB Created: 2021-06-29 15:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ec7d53aa2fe4b3a9fe6cb8be3b0dbbda SHA-1: d54b2490080c029203d019f95e26acaac303f2cc SHA-256: b63569b6f80b6667c214b11c011ae61dd7059846904e9a50b319ee32dc587d75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of external URIs and the structure of the PDF point towards an attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://drafthe.ru/uplcv?utm_term=currency+exchange+international+near+me PDF link annotation
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/4480e6a9c012fe0a6e12c144cf259dac/67720456209.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796569a2bd5---18534773531.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/d51tpld3sp4ceqotul8odp0hg5/tegatonijulufiriz.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/1598363687367a705792942356ad567e/gasib.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4216e8851---92895192907.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/cacc80349a2dfb442742566cb3d76e13/leleninaborefazowofo.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/c762af521503c133907a442fa02b2be5/7517431304.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084f0ba7a424---xopabijafujuvadutiwarat.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/zifefokes.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-6-3/20210603025404914486.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/mewudimajomara.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/48636257283.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5h556jhtbp2433o40d4papdla4/goxopotubadomuk.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/f7a91501ce8285442c8e716d0af773f5/88364627999.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/5c2f4b9e1e88a7606fa1815029d76840/wibusitakonadef.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3352b5789---24538960634.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/7399b50f5397e2b8e162a9b11d3bd448/pufasegageduxina.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/55s97lo3rtq21a8fp4plk44fmc/ruruwivufij.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f08576e47---japobofoneki.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/93c2e323e9a80472778b2935b0788671/jiramexu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b265731f374---kufoxepizulogozijoluragam.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/e66d885e6e820ea83c0e6f94620d6930/pofosopipolamimaduwofako.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac889d389bb---givopubamudogegapos.pdfIn PDF document text
    • 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_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 17548 bytes
SHA-256: dbdf8ff2b5cca8c57592980c38458dc86c1ed57cc8eb58f225fd556ed492fa1e
font_01_sfnt_off00011a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A82 10856 bytes
SHA-256: bf1b22c51871e6498589eb82f5157d58931698e8552c2eb2d35905156884b91c
font_02_sfnt_off00013376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13376 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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