Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ea3904ca1d2af1…

MALICIOUS

PDF

80.3 KB Created: 2021-03-16 15:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5dd1519b28df638aac6d97b71204ccf SHA-1: 107e8b1abc3927096f170dafaab7eab3d38264de SHA-256: 56ea3904ca1d2af17e1344b06ebf400e9ccd411ce46d3ab717cf49cbd6027810
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The presence of external URIs and the link farm heuristic suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to redirect users to a compromised site.

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://vilenefex.ru/strik?utm_term=lowrance+hds+5+for+sale
    • https://cdn.sqhk.co/rijatazuga/gEjbExi/virtual_dj_sampler_sound_effects.pdf
    • http://nesapumedavemag.iblogger.org/25509886755.pdf
    • https://cdn.sqhk.co/siviraboriru/hLjahfo/45441030151.pdf
    • http://gonugotez.22web.org/brucellosis_in_goats.pdf
    • https://cdn.sqhk.co/rubuxupab/84dDJ8m/ranoni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zovavabiw.epizy.com/5278142582.pdf
    • http://taxupot.rf.gd/76287566255.pdf
    • https://fb3efafe-1b0e-41a1-9434-8bf556110c4a.filesusr.com/ugd/de5e41_4b1d761f2cf344bda0581a64ba2f9683.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a05e21b4-6e10-4e39-aa86-d6d0b27d1bfb/creating_web_services_in_asp.net_mvc.pdf
    • https://s3.amazonaws.com/jojitagifuva/fantasy_grounds_pathfinder_advanced_class_guide.pdf
    • https://s3.amazonaws.com/visagogijulep/26872157950.pdf
    • http://bodegifu.atwebpages.com/jofowefobuga.pdf
    • https://uploads.strikinglycdn.com/files/611faf1b-7a20-450a-babc-2aa0e0cd65e3/is_convection_microwave_good_for_health.pdf
    • http://wumugajus.onlinewebshop.net/zuropevoxosulekaf.pdf
    • https://uploads.strikinglycdn.com/files/1b31b0ce-3e72-457f-a966-4687f3b4d0da/can_a_burner_on_a_glass_top_stove_be_replaced.pdf
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_e3220541d0ec48f4a216d0ccccb2767f.pdf?index=true
    • http://sokevigaku.rf.gd/heinemann_chemistry_5th_edition_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee75.bin
336531b6975a9433c40cb5f059034fdaae7dc3dc65fe40474e612c9703c2dd46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 4928 bytes
font_01_sfnt_off0000ff37.bin
29c38325bde2f578bb512e39a6f5fa03fb815520ae53a2713922bb8fba219e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 11384 bytes
font_02_sfnt_off0001266e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1266E 4324 bytes

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