Malicious PDF — malware analysis report

Static analysis result for SHA-256 06987eb49cbf0dd8…

MALICIOUS

PDF

71.0 KB Created: 2021-02-11 04:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 79a4cd24d72982ad93412e2f00690e15 SHA-1: 3be39d736837ceb1dcda590de87643d0823244b8 SHA-256: 06987eb49cbf0dd8f40d8a27b51323a4ccb149b0bfc8b1c92d7b96d3cd46c50c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'druttle.ru', which is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, possibly for credential harvesting or further malware delivery.

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://druttle.ru/wb?keyword=chk%20file%20recovery%20free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463830/normal_5ff7a2545aec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_600d79fb9cf2a.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/GhgeDTt/lufogudizurifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501380/normal_6013f51614e61.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/ghqzib7/nowafukutom.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/enB9rCt/16049047945.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417815/normal_600626801c8ae.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/jaEgcN9/zidujufebowixigigip.pdfIn PDF document text
    • http://sis-paypal.com/future_fight_epic_quest_guide_fantastic_foura7i69.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/hcbXQig/classroom_management_plan_high_school_math.pdfIn PDF document text
    • http://moitender.org/19118635566jg5bx.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/dUo1MYy/23416926592.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/S2qkzif/22877007395.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/hgLPdhb/50008282081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/firigugixujotov/business_plan_template_new_zealand.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF6 4432 bytes
SHA-256: cf9b6641d9a4d1621350eef197308e6c2f261b95a3345dda83b9db3903dc28ab
font_01_sfnt_off0000de17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE17 10208 bytes
SHA-256: 8858c4ac4b40210bddb6038885debc5265673260717dc0e5a1890100fc9b140f
font_02_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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