Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ffaa5fdaad86b9…

MALICIOUS

PDF

81.7 KB Created: 2021-10-09 16:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9f7d463b567c38ac82b08d04f719b220 SHA-1: 7163950a468afe274e21eda77f0ef47ae73e4df6 SHA-256: 68ffaa5fdaad86b96a56c804a5bf8008caa823e5a49a10741e5378c3cc629b2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism to phishing sites. The PDF structure and embedded content indicate it's designed to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://infrive.ru/uplcv?utm_term=the+handmaid%27s+tale+emmy PDF link annotation
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c5b36e588---17149055847.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/bagadebejokibedumuxun.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/18338032839.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/78334712060.pdfIn PDF document text
    • https://ikima.fr/uploads/file/3534952494.pdfIn PDF document text
    • http://dhf-china.com/d/files/98921793324.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/xoxazeki.pdfIn PDF document text
    • http://saint-party.com/media/file/62669863326.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/zobigetitoxonogaforovivab.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/98857295064.pdfIn PDF document text
    • https://jurad.eu/files/file/88888771376.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/37905553302.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/98079780177.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/26727247880.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210902040326899.pdfIn PDF document text
    • http://ecocj.com/userfiles/file/20210923000930.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/77406754134.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/jefuki.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/davopomiw.pdfIn PDF document text
    • http://archbot.pl/files/file/65692011127.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/vagiziduvikokaxogabuvuta.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/dupodogiligijokokiwox.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/79462198641.pdfIn PDF document text
    • http://ranchobg.com/img/file/6005072463.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF6 17084 bytes
SHA-256: ce4b62113b0fc6e0a1f6f971c6e32d333f5860409a1e835dc4b03770e7c5ff11
font_01_sfnt_off00010859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10859 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12070 10404 bytes
SHA-256: c45ea91b1542c6989ef509f58561a0a3486ec22ea84a2dedf6b4070ca6406a9b

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