Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0dc6c54e2d49ce0…

MALICIOUS

PDF

85.7 KB Created: 2021-01-01 09:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1230e2af2c06a20492ac75dc5041bca SHA-1: d027eb28903685bc9291b00295b7109976257140 SHA-256: c0dc6c54e2d49ce08cc8acccaef70203d7a6020cd9655d5a5b07b7ed48356d32
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=motorola+baby+monitor+mbp36xl
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/407438.pdf
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/3510404.pdf
    • https://cdn-cms.f-static.net/uploads/4485826/normal_5fdb1c83a322d.pdf
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/0d1aa44dd3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/520be63b-6e46-4a65-96e3-7a9a0ea56b3a/watchdog_of_farron.pdf
    • https://s3.amazonaws.com/lerezazo/81019775867.pdf
    • https://s3.amazonaws.com/warapagefasovi/tudutubolo.pdf
    • https://s3.amazonaws.com/rawesaragegugar/36778052355.pdf
    • https://s3.amazonaws.com/tapexiw/vikram_vedha_full_movie_with_english_subtitles.pdf
    • https://uploads.strikinglycdn.com/files/22d5824c-e758-4255-b5df-921b1e0f5847/sobasuxuxox.pdf
    • https://s3.amazonaws.com/wurivuve/groundsheets_for_tents.pdf
    • https://s3.amazonaws.com/xanunafojuloki/buxukojudadusavovixubib.pdf
    • https://s3.amazonaws.com/gofilafixu/apa_format_website_citation.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012dfb.bin
7f0dc3c61df3ef5a9221411d13d9c18abf2f348b8c82058bd1a160a9487c3cff
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12DFB 18068 bytes
font_00_sfnt_off0000f701.bin
e14af981faeb4d6b1ac272937f4a9a218dfe37bef16ab8a1c09617f20c14dfca
pdf-font-stream PDF embedded font (sfnt) at offset 0xF701 5420 bytes
font_01_sfnt_off0001096a.bin
1bd18b849ca34cb9b10e587baee84c52bf8c65ddd1c1c337b5f7c48e70f7375b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1096A 10696 bytes