Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0697633fc226ae0…

MALICIOUS

PDF

73.7 KB Created: 2021-09-28 08:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 40a8ec54bfc8c5d72db59796cabe0d87 SHA-1: 9be5c8a61d51f58b9d5897314b83a8bbde138a21 SHA-256: c0697633fc226ae0b2e94e8cb8dff094bbd3cd081ed7a027272a5f93e6aa51ca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are flagged as link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://coretry.ru/uplcv?utm_term=optik+tv+on+firestick PDF link annotation
    • http://gestioniarmatoriali.it/nofopatefiluzed.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/mesafe.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/1192515646.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/35660828780.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/34062089450.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/vokojuf.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/xafovibinisapobide.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/zobewar.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/wupewefozuzozibatale.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/53085627612.pdfIn PDF document text
    • https://iimranchi.ac.in/ckfinder/uploads/userfiles/files/zelilamawegokodukeginotiv.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/17288644041.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/dobosuxuw.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/zibigonem.pdfIn PDF document text
    • https://stvorki.ru/files/file/41664069593.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/54046460016.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/72395853560.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/befodaxusitedolozud.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/rujatodep.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/90104727651.pdfIn PDF document text
    • http://vedepcuaem.com/luutru/files/62531284236.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/borafazigoxirudugurewi.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_off0000b805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB805 10448 bytes
SHA-256: b58f662aea6829568921b9df4ae1c8e8b6af2b9bd7470a5ef69ab4ed49de6ad0
font_01_sfnt_off0000cff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 19364 bytes
SHA-256: fc1929de87f537fd059a34a3c582f7c30cd5eebec83acfd8705cc38ef8ecf69e

Open this report in the interactive analyzer, or submit your own file for analysis.