Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ec43cd067d6404…

MALICIOUS

PDF

79.4 KB Created: 2021-06-06 16:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e51e3c147ddb63ca10bff4cdb59ed4e SHA-1: 11bb523ed85c0940ef89ff5c1911337748228ad9 SHA-256: c9ec43cd067d640496f90d401b934a369a06d64ebf509e68dbd74e942715c806
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/pbw?utm_term=download+pixel+gun+3d+mod+menu+apk PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4378608/normal_60b4a7a73a32d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473415/normal_600dd36e4b022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415334/normal_6046342cd60b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_60515a16deccd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5fe27daea07e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481676/normal_5fed5f0d7bbba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://felinemumivu.pbworks.com/w/file/fetch/144583545/blyss_dehumidifier_ygd16-5166br2.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/management_of_iron_deficiency_anaemia.pdfIn PDF document text
    • http://pefumugat.pbworks.com/w/file/fetch/144592278/how_to_invert_colors_when_printing.pdfIn PDF document text
    • http://gibuwodebu.pbworks.com/w/file/fetch/144571143/zinunegizugovavokiwowi.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/w/file/fetch/144512034/86361327583.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/f/microelectronic_circuits_6th_edition_sedra__smith.pdfIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144561210/what_to_write_in_a_certificate_of_appreciation.pdfIn PDF document text
    • http://xuwedateredu.pbworks.com/f/gubezemunopowitabexuwo.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/w/file/fetch/144560439/tenunatogo.pdfIn PDF document text
    • http://numefen.pbworks.com/w/file/fetch/144539748/16736220468.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144413241/the_power_of_critical_thinking_5th_canadian_edition_ebook.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144423078/ruwiwo.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/nenjodu_kalanthavale_full_song_download_masstamilan.pdfIn PDF document text
    • http://nerobedevu.pbworks.com/f/redarunod.pdfIn PDF document text
    • http://xuwuziz.pbworks.com/f/86018461250.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 5392 bytes
SHA-256: 5531cd179a16377d9e39d920230245178c0ed119ed27bec273afe2b94c072984
font_01_sfnt_off000100a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A9 1956 bytes
SHA-256: 7e75d3c1f130785d7af79cb5c61d473b881826d8647499538c35fd64811baf21
font_02_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 10812 bytes
SHA-256: c6395730735fb8aea6f41a26f74a048120850958c9f16d2c28565d54352868b7

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