Malicious PDF — malware analysis report

Static analysis result for SHA-256 f696ebee7fb79cdf…

MALICIOUS

PDF

78.8 KB Created: 2021-09-18 06:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 68bf304e06ca0bb583635aeee89ebd9d SHA-1: ec105b97221e14b89a9f5d0d53d3e1e5a23182a5 SHA-256: f696ebee7fb79cdf9831510ebe2da6369d7c80b850ef022b0d55fba2d0564c35
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by multiple engines, including ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to suspicious domains or are part of a link farm, indicating a likely phishing or malware distribution attempt. The PDF structure and embedded content suggest it is designed to exploit users by directing them to external, potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://peter-scherer.de/userfiles/file/nilobis.pdf In PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/10767471812.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/talobisogugudav.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/3744807587.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/nozojabix.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/67164857299.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/wojebomufur.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/raves.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/pavesowejigutakijo.pdfIn PDF document text
    • https://maria-galland.ru/files/file/97459499965.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/xotaradirijadosuv.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/wezikozejexaseluwusuzinef.pdfIn PDF document text
    • http://furniture83.com/upload/files/fuseg.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/lapufupezotowamo.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/fixidanelafatupogugeli.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mitixapemonububopepix.pdfIn PDF document text
    • http://epicridesnepal.com/files/vunajogazi.pdfIn PDF document text
    • https://transdeliveris.lt/userfiles/file/24193303788.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/91238920325.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/gakixegijeludonevibewax.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ufanf7m8gan9qahn9ue0i96i6e/97817643587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=caperucita+roja+obra+de+teatro+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_off0000cd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD33 18880 bytes
SHA-256: a95ea45696ade5c96a91541b587960ce7803119388a9b3738de93bc01eca81de
font_01_sfnt_off0000fd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7E 10696 bytes
SHA-256: 6122b2927d67891e97d206f5fa808e04810ca90c392da8ca64a156d965b35460
font_02_sfnt_off000115ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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