Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f19e1143f98406…

MALICIOUS

PDF

73.4 KB Created: 2021-05-18 09:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cc367c727095c4a6877883aced6bd9e4 SHA-1: e306dc8695baa2a8bd4c27ad29f4e4d0be071436 SHA-256: b9f19e1143f984069a76498ce7a4bffad0102492a5cd38bc09565ceb0efba392
104 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains an embedded URI pointing to 'soxebez.ru', which is likely the distribution point for a malicious payload. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/strik?utm_term=athlean+x+women%2527s+program+pdf PDF link annotation
    • http://fudopajir.iblogger.org/lodemovizovogatusi.pdfIn PDF document text
    • http://losadodika.22web.org/murray_mower_deck_installation.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/448ea59d-ef6c-49d1-b34e-db702d66a509/zuduwatilu.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/97969450529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d838497-b570-41e9-908e-214d892c6a59/free_adobe_premiere_pro_cs6_intro_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25b0b6e-2b91-4931-8f0c-d6fed864c60b/tigoxoxojasipobenuwazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306bf745-5a2d-4d0e-8bc2-b13b410b3c0a/xazazonilosuxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2791b9-6cbe-40ef-bb7e-6bc0e44c22c8/44849520642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748c77ab-2498-4fcc-bdc4-4b8e8006efdb/pafuxunizo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/73290926727.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/57403865155.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/806097422.pdfIn PDF document text
    • http://sobakijej.rf.gd/50830889539.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/life_is_to_live_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/ridimoguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34e81a6-e57f-41bc-80d7-5494cae59ff3/giwuxusigosagum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffe30af-93e2-4988-82a8-8b901805bd52/public_relations_salary_with_masters_degree_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45f743b-f73e-419f-8bcf-e04b95a55023/balufiwin.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/ghatna_chakra_reasoning_book_free_download.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_off0000dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6B 5636 bytes
SHA-256: 4850e3533e31a2cc4a688af6bf142049fa1942d450c0f37cfa5bb11665ae724a
font_01_sfnt_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 12432 bytes
SHA-256: d5b43245ec63873fe34c5474e4f1754a0d7c2f4d2cddad39b5b19c9b5ff7ebd0

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