Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06c96e125ec2fca…

MALICIOUS

PDF

68.9 KB Created: 2021-03-07 21:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 46a883fb72ea7917bc9c94f8b19d8f7c SHA-1: 2772357f78750a96bc16582acd226144be92ed13 SHA-256: c06c96e125ec2fca4dada6de0ca5f062a8f5946c2e0729114464ccfb73b007c5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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://ponafet.ru/wix?keyword=forensic+science+fundamentals+and+investigations+answers PDF link annotation
    • http://fakts.design/agnes_monica_sebuah_rasa_mp4ohs7l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5ff25e39ae903.pdfIn PDF document text
    • http://ersoil.fun/fbv_shortboard_mkii_midiikpei.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406168/normal_5ff86beb80352.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/how_to_fill_out_petition_for_letters_of_administration_georgia.pdfIn PDF document text
    • http://steh-sistem.ru/47951091694f3cr4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutugidod.onlinewebshop.net/is_cloud_9_on_disney_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/vuluwavobevaburukurimav.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_87436d718e0b4b579b32753bb419bc00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/mandated_reporter_requirements_illinois.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/printable_cursive_letters_worksheet.pdfIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_f44ae8d9c4b84511823bccbd013831cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/fezirug.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/nivuvuzabato.pdfIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_cf6c1c53f9c94e38a1a673af9c42087e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jijumupade/jexolejuximugi.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/44377031142.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_8d533f8052884cef9a8c5a1b3890ed0b.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F8 5448 bytes
SHA-256: ca55942ac481b9957317118a340c70260787940fedcd7998348273ad9a577dc6
font_01_sfnt_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 13464 bytes
SHA-256: 5e42aaf84a540b93f7d285f15a31cd4f88748107512ca1ad43005409d0b43360

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