Malicious PDF — malware analysis report

Static analysis result for SHA-256 df663de9d917f719…

MALICIOUS

PDF

82.0 KB Created: 2021-09-14 02:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: a2a2ed2f136b6778cb0a85c2afb27e75 SHA-1: 2e677e126763d3745decd724ca7b445ebb09e696 SHA-256: df663de9d917f7195f01aaafb694f08401a0c6acfb32a8432711b75175b989a4
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://krisoc.ru/uplcv?utm_term=dise%C3%B1o+de+interiores+un+manual+pdf PDF link annotation
    • https://alaqart.atelierleuthold.ch/userfiles/files/92470596165.pdfIn PDF document text
    • https://highrise.pl/file/63796777458.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109011816396732.pdfIn PDF document text
    • http://4bx.pl/public/file/novibefuxobipox.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/puzifepeto.pdfIn PDF document text
    • http://humanlitech.com/files/files/2262435610.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/1530138297.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/13078148344.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/64075208043.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/6699739438.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/fizapisuxunuluvow.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/63946209372.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/65875236579.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/2814a882a0b0d79fedec69c47a4a1eff/fokinebetulapa.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/paxupesusufovuxazeji.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/xarefo.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/lelajilobukusarebe.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/mabulu.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210904093603.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/74235508650.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/45839078448.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210906_212403.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/16397128985.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/xudaguvipized.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 7

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_off0000d63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63E 19152 bytes
SHA-256: 0dc8de86f31fdb9e91f26791e5d1a57c8fc4561b158b06a738c5f390e125c91a
font_01_sfnt_off000106af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC6 10968 bytes
SHA-256: 8216ad3812056b8a773b7db625c9cf429d3ca8e4dd98ce55843a274b53b766ec

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