Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd37c05f4da129b…

MALICIOUS

PDF

91.3 KB Created: 2021-03-30 08:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47d8688a2bd4337693ba517be425c801 SHA-1: eaf27aa74ac926977675054ccd4f39d2b75a893c SHA-256: 6fd37c05f4da129b98717f679cd27d095ab873c785e8d4cd76a5b0004ca8316d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, appears to be a lure related to game secrets, likely to mask the true malicious purpose of driving traffic to these external resources.

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://bologen.ru/wix?keyword=mega+man+x3+boss+order+and+secrets
    • http://wifefavowe.iblogger.org/10147503666.pdf
    • http://pivojowemetobiv.mywebcommunity.org/bluestone_alley_piano_notes.pdf
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5fd105f5ddaf7.pdf
    • https://sipedevete.weebly.com/uploads/1/3/1/4/131438766/1dcd748ac5f94.pdf
    • https://rusebetasamafi.weebly.com/uploads/1/3/3/9/133997145/4691417.pdf
    • http://vowuzif.22web.org/xenoxolekifivukepaduv.pdf
    • https://static.s123-cdn-static.com/uploads/4374848/normal_5feb418591289.pdf
    • https://static.s123-cdn-static.com/uploads/4448549/normal_5ffdacdbd8cc7.pdf
    • https://cdn.sqhk.co/metevetufi/aL6jbgi/basketball_shooting_trainer_for_sale.pdf
    • https://cdn.sqhk.co/waxobakal/jdMjcci/miviled.pdf
    • http://zesegalos.scienceontheweb.net/montreal_cognitive_assessment_test.pdf
    • http://gavowobow.iblogger.org/kijaxovedeluduruwidufuj.pdf
    • https://cdn.sqhk.co/sizozizaj/jfifheX/meteor_shower_october_2020_nyc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pupagerirawax.myartsonline.com/pesizeturabijem.pdf
    • https://uploads.strikinglycdn.com/files/57244cfc-08a6-4b19-8431-a05834c8625a/90906812754.pdf
    • http://gulamodujanir.epizy.com/35206648999.pdf
    • https://uploads.strikinglycdn.com/files/67c5dc8b-7788-4f5a-a9f8-09b458756482/who_dies_in_ff7.pdf
    • https://uploads.strikinglycdn.com/files/4ef57c0d-26b6-4753-8d4c-a2a28a3a2916/what_is_the_fourth_of_july_to_a_slave_analysis.pdf
    • http://petizitopebil.epizy.com/dazeganevabiniwajeb.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_off00012740.bin
ee1a190e3ec4fbdc9e840610dc5c1f03111a6b5e715e19fab74456c09331fc47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12740 5604 bytes
font_01_sfnt_off00013a4b.bin
8e03863aed7246846b43744b17719b7badb565c17e8dd5855a66475d422a9b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4B 11012 bytes

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