Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c96bc9f20c5c69…

MALICIOUS

PDF

73.9 KB Created: 2021-03-07 02:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aee1a53573372a9d43520bee29a6c4c6 SHA-1: 2e8ab5c2f2f22335648aabf0f7b2ea0b3902ce19 SHA-256: e6c96bc9f20c5c6976b1c4a6c70828feb2fb06752a6fc071e8b24fec6c32c269
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm, and a ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous external links, many pointing to potentially malicious domains, suggests an attempt to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=power+wheels+ford+f150+extreme+sport
    • http://potavivas.22web.org/commas_and_direct_address_worksheet.pdf
    • https://kozamewibigox.weebly.com/uploads/1/3/0/8/130874388/4724a.pdf
    • https://definifizuzum.weebly.com/uploads/1/3/4/7/134759181/zuresapugikav.pdf
    • https://gakofalu.weebly.com/uploads/1/3/1/6/131636889/1094136.pdf
    • http://lesitegu.iblogger.org/6776536931.pdf
    • https://nixovutak.weebly.com/uploads/1/3/1/4/131406963/tokuxiwikukus.pdf
    • https://bonomomu.weebly.com/uploads/1/3/0/7/130775928/ziwawoziraxe-xezobixi-buxili.pdf
    • https://moxamegok.weebly.com/uploads/1/3/3/9/133999551/6517355.pdf
    • https://pafolerasakuj.weebly.com/uploads/1/3/1/4/131438226/ecbaeb5f1475129.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5eb9cb89-ab34-4e7e-9851-d7210d0d08a2/why_is_there_a_blood_spot_in_my_eye.pdf
    • http://pepebejawu.epizy.com/arlina_design_template.pdf
    • https://s3.amazonaws.com/suzixegazunow/beginner_pilates_reformer_classes_near_me.pdf
    • http://dujofaxuro.rf.gd/2056666628.pdf
    • https://s3.amazonaws.com/ruzumeb/sample_project_management_closeout_report.pdf
    • https://s3.amazonaws.com/nevowimo/film_frozen_flower_bahasa_indonesia.pdf
    • http://besigaku.epizy.com/skf_y_bearing_catalogue.pdf
    • https://s3.amazonaws.com/ladojenefe/50431602697.pdf
    • http://gejevebo.epizy.com/gulojudetikanatilaniju.pdf
    • https://s3.amazonaws.com/bubisifapagefe/transatlantic_slave_trade_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/7cd6d6c4-7797-4be7-bdf1-a0e0c3a3ed0e/2003_harley_sportster_1200_owners_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d6.bin
b2a7a7d119190529c0d7b07c604cd0adecffbfd0f1fb324065b5e5ca71807c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D6 5548 bytes
font_01_sfnt_off0000f4b3.bin
bac34ee661b2ca9cf96611d640a815a4e52ad2953e60c02285256d337c91b229		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B3 10592 bytes

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