Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f196c12ef21f90…

MALICIOUS

PDF

86.3 KB Created: 2021-06-13 13:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c8aba85cef431304ae6ee25fe69f3a01 SHA-1: 0f4a63d514d5822d5f092bea669a27b3ee8e2827 SHA-256: 45f196c12ef21f904134132926a0a4db0a7ed6103248fed9212bb6cebf75abf3
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 0.9998

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 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://drafthe.ru/pbw?utm_term=martin+pk+beautiful+jesus+mp3+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460463/normal_5ff8a60523b89.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/sajeruvegeza_donezebadas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408878/normal_600014b247ca2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470980/normal_5fcb7d39869f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_6011c266ae2b3.pdfIn PDF document text
    • https://vozabamoz.weebly.com/uploads/1/3/5/9/135959881/a83c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_601cdf03e4626.pdfIn PDF document text
    • https://xesevurodat.weebly.com/uploads/1/3/0/9/130968943/sitaxoj.pdfIn PDF document text
    • https://wededizopi.weebly.com/uploads/1/3/3/9/133986349/wesogutedoforalot.pdfIn PDF document text
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/83b9db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b47ef0-baa8-4002-944b-41982496965f/11321288525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e1693f-6e77-4979-b462-3dd74f4f36af/89730988565.pdfIn PDF document text
    • http://jowukon.pbworks.com/f/unit_conversion_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34df5c7-13f7-428a-aafa-c6ab12cd3cae/tuvekar.pdfIn PDF document text
    • http://radejaki.pbworks.com/f/gejamewof.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/f/best_bass_songs_download_pagalworld.pdfIn PDF document text
    • http://xujefix.pbworks.com/f/llb_entrance_exam_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ef5b01-ab0d-4b29-82be-a412587495a2/76185604465.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144420612/waxoj.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144915000/52024862098.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_off00010ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC0 5728 bytes
SHA-256: 5c02d53df6e85c414dc7495b15c94d847c4a31c1b74957796181ce233793c6a5
font_01_sfnt_off0001224b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224B 11872 bytes
SHA-256: 8c88328fade889f26f90fc905ba54cd8dc9d663c32a5ac17dbd9778ceb6b74f0

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