Malicious PDF — malware analysis report

Static analysis result for SHA-256 8943659328ae2e7b…

MALICIOUS

PDF

70.9 KB Created: 2021-02-18 19:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d4a2d658a076e8cd1f41d407278f75db SHA-1: 59c4e6caabac562ec848c8ee2212a3919d1079e2 SHA-256: 8943659328ae2e7bafefcf2652b803200c2fc7399ac8d25ec1fdb9e8481189b2
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The heuristic 'SE_INVOICE_LURE' indicates the document uses an invoice or payment theme to entice the user. The embedded URL, 'https://leonvi.ru/strik?utm_term=zondervan+compact+bible+dictionary+free+download', likely serves as the malicious payload or redirects to it, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=zondervan+compact+bible+dictionary+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414678/normal_6022c9df8b914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_5fd663b37e169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_600a86ba26b92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_600c9852cda43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501367/normal_5ffba2fd21238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_6010d9e310829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_600cefffb0eb9.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuvajebodu/mE7ichj/41826316738.pdfIn PDF document text
    • https://cdn.sqhk.co/tenotitur/cifgi4m/wixaxodavubugelamuzafozu.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/hd7FhiA/stick_cricket_2_mod_apk_all_unlocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_6018771c2f4e2.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/mejigavukolu/95122416533.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/anydesk_for_android_4._2._2.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/30745395328.pdfIn PDF document text
    • http://mojefujal.rf.gd/ppi_complaint_letter_to_financial_ombudsman_template.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/tylenol_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/blastula_formation_in_human.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/sheet_music_for_gethsemane_lds.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/83952393603.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_off0000d6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A0 5476 bytes
SHA-256: 38610d23837ccb3dbf2f2439be74c6c629439cc8a5e1eb03ad9844edd70cd143
font_01_sfnt_off0000e944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE944 10732 bytes
SHA-256: 959fd0acb54314bb9aa99b1a5a8f708daf12fd5b6b79ebea3095ebf85bcab900

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