Malicious PDF — malware analysis report

Static analysis result for SHA-256 60343b145ed2b544…

MALICIOUS

PDF

102.8 KB Created: 2021-09-21 03:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ca5980f9603b3e3fc19ff4bb299a846a SHA-1: b99a63e99938d1a498004ea48ed672de55aa05fd SHA-256: 60343b145ed2b544ec398f15dbc98c28fa8d8c37d83c3d0f6c1371e64d952d03
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://benthanhsgfarm.net/images/uploads/files/masuk.pdf In PDF document text
    • http://pibar.tw/uploads/files/202109191912267037.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210911062904.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/39591899724.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fba35580ba---kepoxofivisebakajetiwit.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/45814896847.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/gofiboleworobafe.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0787141df---raganalurewulobanuparoj.pdfIn PDF document text
    • https://lorus.rs/files/83491259190.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/75443126853.pdfIn PDF document text
    • http://techmechengineers.com/uploads/24733867083.pdfIn PDF document text
    • http://metzlerranch.com/userimages/81609299800.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/4369544943.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/wedefupozofigunixememeja.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/22401780891.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/68225909465.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/vavumoxita.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/sibaze.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/jujumemupazazepaw.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/dagorodivi.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/56513127563.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/vewazetonidu.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90740766289.pdfIn PDF document text
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/jibawobaxati.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/49609800631.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=7+ka+square+rootPDF 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_off00012910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12910 10152 bytes
SHA-256: f48994cf04ab2517fccbbf13e89c52a952014c70f411ae323f8283d1b2454434
font_01_sfnt_off00013ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFC 20144 bytes
SHA-256: bcc915404edc977c40094cb26dac873df4991e62c5ada99938fd2432371b0352
font_02_sfnt_off00017473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17473 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1