Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0df7c6bd5afffbf…

MALICIOUS

PDF

68.1 KB Created: 2021-09-22 22:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2b8184bcdf7e4c217af8f288b43f2071 SHA-1: 1b36ab0a596b3bd065bc4f152b4119ec37f4595b SHA-256: d0df7c6bd5afffbfaa2919abb14eda00af70b4f849e015e4f361b507f01c8375
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external domains, many of which are likely part of a link farm designed to obscure the ultimate destination. The presence of these links suggests an attempt to redirect users to malicious websites for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://allytemp.ru/uplcv?utm_term=fonts+for+keyboard+apk PDF link annotation
    • https://adian.eus/files/galeria/files/bivikamoriketeno.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614844c1cbebb---vadibanorunekulavon.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/56508823153.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/filuregufovalafe.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/33552001001.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c287aee10efc4e257e4bd13a316aac43/47251867421.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/podazowadidotakexum.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/zagofasifolodasazu.pdfIn PDF document text
    • https://securitydm.com/slicice/file/zugeninina.pdfIn PDF document text
    • http://artepcb.com/upload/files/wuzowom.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/44551946121.pdfIn PDF document text
    • https://southafricapools.com/contents/files/86438995906.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/sazefenisafave.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/32079628207.pdfIn PDF document text
    • http://www.yt333.com/userfiles/20210909/file/1631196664.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/20722998963.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/tiketaziguku.pdfIn PDF document text
    • https://anbc31.iscriptscloud.com/app/webroot/files/file/muronimij.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/50876511088.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/45185648797.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/65971400930.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/bojotajipekapuzit.pdfIn PDF document text
    • http://dsagco.com/Upload/file/zevobivabif.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_off0000ad16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD16 10676 bytes
SHA-256: 54917a927f842a03b11aa9115623156d867c5eb61fdf50ed157904db701b0d42
font_01_sfnt_off0000c58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 15332 bytes
SHA-256: 2d21bd2af9ffe9b39af4e5fcff16edd8fe08aa73687b3bf76aa86af387b047a7

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