Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97df052c03d458e…

MALICIOUS

PDF

70.3 KB Created: 2021-10-01 17:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bd82d15b0ad7fc2bf20f991e6538372b SHA-1: d04bf2ef484c12fb96b4a96c12b5faecda09f80c SHA-256: f97df052c03d458ef35f08fa3fe99b269a1d973c0bc08394fe438f12c96ac014
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically pointing to 'pixomot.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document functions as a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of multiple external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=most+liveable+place+in+the+world PDF link annotation
    • http://cadelupo.it/userfiles/files/wizuburilejuvosevogeg.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/1936318105.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/49131530960.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/gareja.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/wapabidika.pdfIn PDF document text
    • https://ycb.one/pro_pic/files/febugozomivawufitusobuna.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/53312251697.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/83196268755.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210906085601_1520924550.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/43399475954.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/sugak.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/mipevupobefudozeputulus.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23796978193.pdfIn PDF document text
    • https://pratham.one/file/87131497941.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/23053957280.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/ligisolunosojagudi.pdfIn PDF document text
    • http://rilta.net/userfiles/files/23015416974.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134ba21c6471---6499345835.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/15735591788.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/83601609000.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/90456534514.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/fifijuwunofon.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/38321766585.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d215e58d88---famana.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_off0000b336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB336 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB48 15552 bytes
SHA-256: 9e96b4ca5c327cfa88df744ad75a8c68f4f6cd8a461f676ee0125d3d2096f05f
font_02_sfnt_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 10896 bytes
SHA-256: 16462e110e927c39002dbe7f0998b5833609c2723325a465a5ba693052ef05a8

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