Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65d9c07f83c4230…

MALICIOUS

PDF

79.0 KB Created: 2020-11-17 20:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 09b6e63804075749a007b82266b3fc7b SHA-1: 51ff4a8fd446a7b87156b18fe233b4eef2bf83b8 SHA-256: c65d9c07f83c42304fe225d1ec4303c9dc89e762e473302ea8dcb417405a3c8f
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic or distribute content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be a precursor to delivering a password-protected archive, a common tactic to bypass security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7915

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gettraff.ru/123?utm_term=philosophy+final+exam+practice+test In PDF document text
    • https://tesokumerapaj.weebly.com/uploads/1/3/4/5/134522001/pujewagixam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f885286ce389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f9b44aad1fa8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/merge_dragons_cheat_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/manorama_year_book_2018_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/biozone_international_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/winrar_password_remover_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/zukukelejurotef/48097360855.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/mr2_spyder_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/31801341455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d68ea420-1d08-440e-ade3-df8a51a70f53/boninojibu.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 5212 bytes
SHA-256: 76389109504f60c79229328a6001c3cce1424e2e3a71684ba2f2d1c72ee75298
font_01_sfnt_off00011364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 10172 bytes
SHA-256: 6880dbc71ee3706b92b509c6881ea0a2193496ee4cc88cc0806aa18ffce895ac

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