Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6691f358175c78…

MALICIOUS

PDF

84.3 KB Created: 2021-09-08 16:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2567a96c002860571bc13bffa7e68b87 SHA-1: ed21c9281aaa10d1c2dc6162e2518d42bd76d775 SHA-256: 5e6691f358175c7897295ec9a9ef6c22c545f48bb430cce98869069af7a39420
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous embedded URLs, many of which point to suspicious domains, and is identified as a link farm. The presence of embedded JavaScript, though obfuscated, suggests an attempt to execute malicious code or redirect the user to further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://elesud.it/img_pagine/file/53099691304.pdf In PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/41866022957.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/36427068213.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/jexobavegobo.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/33646582044.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/31706007931.pdfIn PDF document text
    • http://wohingltd.com/userfiles/69752813194.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/86049658377.pdfIn PDF document text
    • http://davobio.com/upload/files/6005861927.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/46398631945.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/24394476785.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/mexijojefik.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/53650057007.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/woxezazununajipixa.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132ae5349280---zujaxilekubu.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b6e6b9a71---84462114689.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/82353095214.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/renusosafoposane.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/takituwirejuz.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/rofipuzixewexo.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/kotumepusobijipalez.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wibaporuduwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=interpretation+aufbau+pdfPDF 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_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 10468 bytes
SHA-256: f7b993de710ecd7d7b3a00c113cb5e3eeb175cdd32c58f6fb1266c2852984b58
font_02_sfnt_off000112ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112ED 19460 bytes
SHA-256: cd6acaae58c54b94f5609ca6f4e34fa97921fc21b7e02a8127fa6711961d7728

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