Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0448fe85d711efa…

MALICIOUS

PDF

80.3 KB Created: 2021-02-22 20:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cfed6b812e4d1eaa234c34303e413df0 SHA-1: 09c0563d70dc3785c450964baf3fb381d260871d SHA-256: c0448fe85d711efab90bd68b83f0b47eb24ff3ccfd59004d038dc5bc07aa2171
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_INVOICE_LURE' indicates the document content is designed to mimic an invoice or payment request. The embedded URL 'https://druttle.ru/strik?utm_term=rent+receipt+need+revenue+stamp' is the primary indicator of compromise, likely leading to a phishing page or a malware download.

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=rent+receipt+need+revenue+stamp PDF link annotation
    • https://jipujiro.weebly.com/uploads/1/3/1/0/131069764/xasefafeguw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366639/normal_5ff6623375210.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/pegifigeso.pdfIn PDF document text
    • http://laxelenokuro.22web.org/best_3d_animator_app_for_android.pdfIn PDF document text
    • http://romeital.space/69039798154lknq.pdfIn PDF document text
    • https://rubebukani.weebly.com/uploads/1/3/0/7/130740450/solizozasunenigube.pdfIn PDF document text
    • http://nujusepu.iblogger.org/kasukujude.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/rofuduk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farezelof/44241140537.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/66247871090.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/39347665057.pdfIn PDF document text
    • http://xumusemowujev.epizy.com/french_league_1_form_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/87742339672.pdfIn PDF document text
    • http://potubavaziripek.epizy.com/dimogalumopibufaziwevomug.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/94672658191.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/tripac_apu_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/sql_tutorial.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_off0000fc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 5256 bytes
SHA-256: 809c2d221b10847156c6ca11463cc0e38b1814e475d6d2dde4eeccb4bb25eef5
font_01_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 11188 bytes
SHA-256: f3f31f290ddd1afb9916826bd604954f7fb75f7a15e6191a4b96e590ba32796e

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