Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eab4c8d2035614a…

MALICIOUS

PDF

98.2 KB Created: 2021-07-04 02:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c14e1d52959c47b9c9409348a36dfe14 SHA-1: ef88ee53ed9e37187b060a1049041201d66d7cff SHA-256: 6eab4c8d2035614ab137f2c7654b178365293631612b5de65e097cbe4eba267c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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=mindbender+questions+answers PDF link annotation
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/0545e6ce295daa08c9da5d6dde607417/95476135490.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/venofifevixug.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/retudunofifodisakopavi.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/updeqg3sbrfqivpr796md0vlro/58252214291.pdfIn PDF document text
    • https://promise-land.com/upload/file/roxozezesulozepatexi.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/c2070ae987440679742348a0c3f07209/tokosog.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/vapd2292cq16k7bfl5pn5a34am/logidiv.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/4307833943.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/9271655758.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c2537fca3be5f2de4798c230168c3627/wofawomepetulegizuz.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c366a52c9ea---56995443950.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8d3db591d---zamupopuz.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/35378528286.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8dc9a8b11---lofibavegedaje.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/48950fac5d236702b670e5876c36cd7f/68040557345.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160da148bb1444---vegufebigejixaxopifebose.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/47768560034.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/23de03252f778c7f22a43a376ca2e9eb/levig.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/xuseviz.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/m75865rvgmv1apo6a84f8vl6tr/bibolujigoladodideja.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/apgunm3ujqsgvr6c84tmoj8ju7/90989283207.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/unqp8vfh88mtveh4ej7cep1rh4/kofofenudazutomi.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/64400877451.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_off00011cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB8 17796 bytes
SHA-256: d48c8f7102aba6a9f431308d85b2762e8bc31d123438e7aa6ba7d2ccd4bdec0c
font_01_sfnt_off00014b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B50 10660 bytes
SHA-256: 21b8c8b0b66dac94aeb15ae0c75265ed5c0ce91639c20d87dfe6f144b8c3a32d
font_02_sfnt_off000163b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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