Malicious PDF — malware analysis report

Static analysis result for SHA-256 203442b23ecddecd…

MALICIOUS

PDF

99.9 KB Created: 2021-08-07 23:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 298bd0744e5dda39ee65f9e38951096f SHA-1: 8027c52d0378994068b5f84b63084e61322dcd4b SHA-256: 203442b23ecddecdd430a400d640c662742115df0c55cb107bdd37f721fccf1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of multiple external URIs strongly suggest it is part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609a81bf9810c---39277869622.pdf In PDF document text
    • http://spreewaldatelier.de/img/editor/file/pefozutarovu.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084b5477c3cf---7772264803.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/pedepofenabinunagojix.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f3024df3e4aaf129184487bb2283d440/79172614142.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0bb9a8796cdba706c5d520f0246dec2e/84135398961.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160728b5d5de7e---sujimasazesapeju.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccbf9bb6cb---20352271750.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/tojex.pdfIn PDF document text
    • http://360mart.net/uploads/files/mujudipagopelinetupo.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/jidotikubabuted.pdfIn PDF document text
    • http://mesahighclassof63.com/clients/79820/File/64764931250.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/m0f26u07mgvkbnmchiilf79q27/demomojafovukewetidezasan.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/49639860830.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160bd924b6502e---58714088985.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bec040123c0---kizadudikexu.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/16f5c23e63e54f2f05c267f8f9d4d900/40909417673.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/misorupisawigafoporoxuluf.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160af28a13e8bb---domawi.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/694f08e10a870e97b3d8831d889b7a15/toviretevarobigivugurasak.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/voveganekujaj.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c702e3ab5d---33979201679.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/76b00f4430e6c5e4ad5c2a126ea43c0f/59461486283.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/lirov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=current+issues+and+enduring+questions+11th+edition+quizletPDF 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

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_off00012253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12253 10916 bytes
SHA-256: 1d549c8cb1a6e1e190d3a85712525131225f5b674ab34103216baee88e446afc
font_01_sfnt_off00013b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15329 17280 bytes
SHA-256: 0b70f892e717adf788c503ee4fd7a722137639eb8c64b22813fb567cb8f4f0c1

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