Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e07d9be260a5e80…

MALICIOUS

PDF

70.6 KB Created: 2021-03-04 02:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 74512d1b38c20266b9b4c2d63664d5ba SHA-1: 3e3ff1121a7c515e9e63b700a4c4d5bcef64af68 SHA-256: 3e07d9be260a5e80f401313ce9ed20e2eb5b3bab6a912248dce537462cc221f8
184 Risk Score

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/award?keyword=the+kite+runner+book+club+discussion+questions In PDF document text
    • https://static.s123-cdn-static.com/uploads/4445333/normal_6008bfdcf2b38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5fe9633f03c96.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/shell_scripting_tutorial_point.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/toro_s200_snowblower_owners_manual.pdfIn PDF document text
    • http://martakkord.ru/fudatenodugubonubibelopy5tzl.pdfIn PDF document text
    • http://myyshooop227.site/advanced_systemcare_11._3_pro70fox.pdfIn PDF document text
    • https://fizabogozof.weebly.com/uploads/1/3/2/8/132815807/7563725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_602d3bd17c68d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482426/normal_603f82d4e136a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472768/normal_5fc95c44536b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokakegobowu.epizy.com/dungeon_master_s_guide_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/kimavapisudo.pdfIn PDF document text
    • http://vowefaxi.epizy.com/ielts_cambridge_listening_test_3_answers.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/75644836396.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_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 5096 bytes
SHA-256: e64dc6efc247abea28f2abf72b5a8b5334ef0cc075818e55701c8d8b327e4591
font_01_sfnt_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 10300 bytes
SHA-256: bd1fa53b45e16510bd05cd7b9b6dda4e4529d3e4d1b5bf5da32b2a6b53fcee3e