Malicious PDF — malware analysis report

Static analysis result for SHA-256 63134cf8cbb95006…

MALICIOUS

PDF

88.5 KB Created: 2021-04-20 04:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fba03d3d3a182ec11c0c99feb1f68e8a SHA-1: cc68a5eaa21275efae439d9f62d92cdd6ce70a50 SHA-256: 63134cf8cbb950067ed8b31d9891126d2e201ae57857033c7498101f1fc22a1c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure related to puppy sales, attempting to disguise the malicious intent. The ML classifier and ClamAV detection further support the malicious nature of this file.

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
  • 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 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.
  • 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://yafferge.ru/strik?utm_term=miniature+german+shepherd+puppies+for+sale+in+texas In PDF document text
    • http://vurejowug.mypressonline.com/the_chrysalids_chapter_9_and_10_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/u7iiNz1/drum_set_parts_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/jZjcCig/takulu.pdfIn PDF document text
    • http://likelid.xyz/cultivo_mixto_microbiologiamh0z9.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/66651429823.pdfIn PDF document text
    • http://rankingcoach-apps.com/nevufifuvekagibuviguzixceshs.pdfIn PDF document text
    • http://uplrezina.site/fanixiboo4ubl.pdfIn PDF document text
    • http://helpcenter.business/mabekiliwumapi534er.pdfIn PDF document text
    • http://ubsvp.com/how_to_blend_colored_pencils_crayolayk3fl.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/thdKggU/idle_agents_evolved_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/gghaWih/dragon_ball_bubble_tea_vancouver_bc.pdfIn PDF document text
    • http://loveworld.club/netflix_android_not_showing_subtitles6znqp.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/lemapobenuteposaniri.pdfIn PDF document text
    • http://beach-fruit.fun/sazuladufuzotvo6m.pdfIn PDF document text
    • http://zespodsvetkoy.site/guided_reading_level_henry_and_mudge_take_the_big_testwa56x.pdfIn PDF document text
    • https://cdn.sqhk.co/saxamabewido/dgjAjhp/call_of_duty_ghosts_xbox_360_achievements.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipokeviti.atwebpages.com/tom_m_apostol_calculus_volume_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8364eb-7129-4185-94aa-b2be886e50cf/ti-84_plus_ce_games_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ee8c32-9356-4066-9499-c61e49a906bb/pibewababokunamuvek.pdfIn PDF document text
    • http://pigutun.myartsonline.com/kofup.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001061f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 5528 bytes
SHA-256: 5c7060275b63fa7390776ef94dac1a32567b4ccc47c8560b8cc27d431afc353f
font_01_sfnt_off000118d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D7 11092 bytes
SHA-256: 5cd935d0603076a60f0fbc2214df4891ad5f4340251444eaf5cbaf0fe2f08e9f
font_02_sfnt_off00013f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F09 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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