Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b338fa1dc98958…

MALICIOUS

PDF

93.9 KB Created: 2021-09-05 19:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1c193daa471fee727cdbcad1127e0790 SHA-1: bd37de63de8bdf88d8ca7925394671eabe511c61 SHA-256: 06b338fa1dc989585da82ee7c8eaf4bffe8f8286007088ff79ddd3375400fec5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the sheer volume of URLs indicate an attempt to distribute or phish via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=masterbuilt+electric+smoker+owner%27s+manual PDF link annotation
    • http://blatt-gruen.ch/files/rideme.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/boveziv.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/papizekotumixuve.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/82441234121.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608045b41426a---37891620544.pdfIn PDF document text
    • http://jngf.cn/files/file/sozojifuxipoxulika.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/wegiverimolipum.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d51316c06---12551467998.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3648391ada---7365140753.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/jafopumusixew.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/fi3vusbi0e3ffl6d2ufi40drj4/70251638483.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/18026277178.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f3db686a53b9ae2046d6e640394cb2f4/zajikip.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/78517803056.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/66505748060.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607092f473e36---bipezoxubikin.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/17689180574.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/nubupetituvukusuwax.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/86418588331.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/507b3501c7ed07ed8bd943499ed38cb0/pisumigugot.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/78fd4dd7dff456de046fb9a2311bfc9e/57421842092.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/kokabozokofe.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/66856689234.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf28289ecc---xijiboxepivavitunefoxenip.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_off00010753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10753 19048 bytes
SHA-256: 021ef01366fe324a3ac809581a9176116628cab2906d4a6c9ce580942887ccae
font_01_sfnt_off000138e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15100 10836 bytes
SHA-256: a08b8d4e4a11ddde01177cbcffc10985e4f9b44dd0d90595f447548222eef67c

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