Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd9d7f6157262f6…

MALICIOUS

PDF

187.6 KB Created: 2020-12-20 17:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bf7dd8c2ef0db6ae5e880f090a456e0b SHA-1: 121e214eab271334192403c575dafa0a0c2b9337 SHA-256: ebd9d7f6157262f672dc6b7ddf6085cb456836631cadcdf1b08d524138f60b0a
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, with one prominent URL pointing to 'trafffi.ru', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains references to 'George Orwell socialist' and the wkhtmltopdf tool, likely as a lure to disguise the malicious intent. No scripts were extracted, but the presence of multiple external links indicates a potential for downloading further payloads or redirecting to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=george+orwell+socialist PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87213409af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f9ca4d0aee1c.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/beger_foriligapod_firokazus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_5f9dd3d877761.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/9610256.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/4a93c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8c6a15b60c9.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/raporoxotoka_gevezirararoji_pagugenuruza_paresoto.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/kovaxivagoz_wekavatonagani_tajiwo_berimivigub.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/kokesatodixon/54628104097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc9fcd0-4696-4388-9c60-38db942c14b0/games_like_gta_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/xiwewamusoxelelewid.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/77875583424.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd37863f59a2572d8ffde5/t/5fdd982015a11837d0936b18/1608357920417/best_ebook_reader_ios.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A434 5088 bytes
SHA-256: 9a4f7d0e6c02dc406432d7cb76dcb987d08b9cb787d6f0b40198cc1055bd374f
font_01_sfnt_off0002b5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B5AC 13532 bytes
SHA-256: 202321634af23bdd59ca80561564fa44092b24c4fcbb8619bf584780fcd1d9a5

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