Malicious PDF — malware analysis report

Static analysis result for SHA-256 1992cac4e9f2fd5d…

MALICIOUS

PDF

67.8 KB Created: 2020-11-19 05:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3eef64268f5e6c08bdd61bbedc37d3a7 SHA-1: 7f8c567eb2d5a2d3c23155aaefb408ebcd0ce1a1 SHA-256: 1992cac4e9f2fd5dfc8b9c53fa4b75594a515e216c5815672546d9e23465bb3c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://trafficel.ru/strik?utm_term=ash+greninja+vs+greninja', which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it may be part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=ash+greninja+vs+greninja PDF link annotation
    • https://valetakomo.weebly.com/uploads/1/3/4/0/134012509/gaxelim-nerej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f92010847091.pdfIn PDF document text
    • https://sojutobifedurex.weebly.com/uploads/1/3/4/5/134588439/lopemubamo-jogisademu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_5fa97cd028652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_5fb2bb01e10de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f8bd687f1966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f8b9d56b6ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478667/normal_5fb38e363e221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd3bbba-ba36-441f-a8f5-c8d1564d90be/dofirosenuguzoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95612b92-0993-4819-8008-0a03fe0e9037/xipok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1615d0-8db4-4309-9af3-36ff2e756540/22078811604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b285b668-d528-4893-8a37-98d00c98ed7b/74403182451.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/cadenas_y_redes_alimenticias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5bdd1da-482e-4313-bc7a-00bedbd66a58/99203453390.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_off0000ced7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED7 5040 bytes
SHA-256: c5d7fb5dac08f10d9f7b21a8b92f9a58d6f6ddcfa72ef594eb3047aa179cad34
font_01_sfnt_off0000e004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE004 10088 bytes
SHA-256: 06836642e17d31b754800d4c903bcae442af20d2697f198f19d86486d887b697

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