Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8d5ed44a7425f0…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 07:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 507c829694b0198df48f00bd6de610fc SHA-1: ceee43e1d9a3f93ec321e1b81e09e06cc9d12075 SHA-256: ab8d5ed44a7425f0692f799e187f5e8b95f23dbd5279940f75f4663781f88ef1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/strik?utm_term=spring-framework-bom+maven+version'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crophysi.ru/strik?utm_term=spring-framework-bom+maven+version In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485454/normal_60539b08c53f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_6048683c38c4c.pdfIn PDF document text
    • https://korodovijexud.weebly.com/uploads/1/3/4/5/134512412/gizebilabefifel.pdfIn PDF document text
    • http://andyhong.blog/what_does_book_of_enoch_say5y8u2.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/nP4HhfZ/farm_animal_sounds.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/heijhih/tecno_spot_price_in_pakistan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_5fe0ddbc36c11.pdfIn PDF document text
    • https://jadotonevuwupu.weebly.com/uploads/1/3/1/4/131407011/200027.pdfIn PDF document text
    • http://app-3null.com/448064310643i1uv.pdfIn PDF document text
    • https://cdn.sqhk.co/tujuvemevo/jcjcsii/st_ives_guided_busway_fares.pdfIn PDF document text
    • http://aazzzry.space/sisovoburok8r4su.pdfIn PDF document text
    • https://kukavijeri.weebly.com/uploads/1/3/3/9/133997324/c412a18ed0f08ca.pdfIn PDF document text
    • http://nefritthebestthing.site/btooom_mobile_gameqo67p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_603186bd8eb55.pdfIn PDF document text
    • http://hamsterbig.com/you_will_be_found_sheet_musicu8mj9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_01206f84231b41a88a205ba57a169ed9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopifu/jabater.pdfIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_219cda48dbb749d9a0ce9665d1db5369.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/askip_apk_license.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/google_sheet_count_distinct.pdfIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_d54d79587ab24e36aa8bb231bfcd6202.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/drugs_and_their_effects_worksheet.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_off0000e52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 5680 bytes
SHA-256: 4568d2457624e7c0cd6db5864acbeefecc2d89c63a871729dc6502d69aaa8e2c
font_01_sfnt_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 11028 bytes
SHA-256: 06de12dde4f16860f19ca0e1d303846e369878c4ee9119bfb9bd5e4ca70848a1

Open this report in the interactive analyzer, or submit your own file for analysis.