Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde0d78414d9e326…

MALICIOUS

PDF

102.8 KB Created: 2021-06-29 19:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 22edfd4c964885400c80953f9746ae43 SHA-1: 02bbae13202f9af71dbc63e55532f3085fb13e30 SHA-256: cde0d78414d9e326b12ad8ea4e30e5ba5ff9986911fc2e7cb67a32bf0b8cb855
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites and other disposable hosting, which likely serve as landing pages for phishing or further malware distribution. The document body is unreadable, but the heuristics strongly indicate a malicious intent to redirect users to external, compromised resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nebovsem.ru/app/webroot/files/files/79824430245.pdf In PDF document text
    • http://skyfestival.kr/ckfinder/userfiles/files/84012161205.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/751ce33ed11eccb72917fa6e2f8f34a8/96449464718.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/vilakisetazo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/o5h7hn50pd0otv9jl7tkm6oukg/38857346915.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607497e706252---51957560749.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d384476ed2d---32884132307.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/fq5975env3hvu55pheqhg84iod/kafogel.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba54f55ff0---ximulobefi.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19872168251.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/2e49e644ede2d60a64f9e63f0fc14c5f/kajezemin.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/36062146359.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/xerenuwolezeka.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/88511857613.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/481d4aee381c681867bb4d96d3b6cf1f/32375030363.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/95390013083.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bbdd2a49c---logabigefituluzabopoz.pdfIn PDF document text
    • http://medi-sen.com/files/files/54631569890.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e07d5125d4---mabobomufapenugonaxej.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a3892dce6---57193467459.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/lidajotalu.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/pebolanukasozodobavur.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/f5otnl3fup5a3e6f21po4mon9s/dadutatarasogovowomolawi.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc962af5ab---gesugizelodit.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/sucou8gvkrs7crkaqbc4ufjtq4/82254559732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=a+network+topology+isPDF 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_off00012eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000146c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C6 10540 bytes
SHA-256: 4525f9870ded8bdeb40a31558f9be9fff040d930c9311323d3e4527c2e95a16a
font_02_sfnt_off00015efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EFD 18224 bytes
SHA-256: 00afd04a10354e6c8d82d44e6f41f3a72eea496e4209cb7fe5a2930f8dcc218d

Open this report in the interactive analyzer, or submit your own file for analysis.