Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb359d470ebcd15b…

MALICIOUS

PDF

80.1 KB Created: 2021-03-17 09:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f1a7d540a2a12867066b71b251b160df SHA-1: bf3a6e60ca00a05548c9492d83ce328155e1d808 SHA-256: bb359d470ebcd15bb00dbdb3691636d0ff7b0eb38a037c865a95a9bf6950f85e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://botokaw.ru/strik?utm_term=get+lucky+tenor+sax+sheet+music', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=get+lucky+tenor+sax+sheet+music PDF link annotation
    • https://faxojoduso.weebly.com/uploads/1/3/5/3/135351685/rubutuxafuzumuxusom.pdfIn PDF document text
    • https://mijipunipiju.weebly.com/uploads/1/3/1/4/131455283/9200520.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/tavoxumuf_muramut.pdfIn PDF document text
    • https://balamunin.weebly.com/uploads/1/3/4/6/134653254/5736294.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/29772936469.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/2859717.pdfIn PDF document text
    • https://setuzenizenu.weebly.com/uploads/1/3/5/9/135973655/nojiratup.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/ba9d7d8b-6525-431f-83c4-8b9d77aa542a/dragon_ball_craft_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/noladetigukamugez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a87471e-d759-4b2a-84c0-e97f352bc71f/tumafevex.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/metal_slug_infinity_pvp_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/abstract_algebra_mit.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/zolopitasugawedafu.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/uterine_av_malformation_radiopaedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a866577b-cb5b-4855-8863-034d056f9167/citizen_chronograph_wr100_price_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/autodesk_maya_2019_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/aditya_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/widimugizegavijuv.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_off0000f86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 5304 bytes
SHA-256: cd8c51140d35210973fa680a38819a62e4d261ae70d89b6f2c1342669dfb0c4f
font_01_sfnt_off00010a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5D 12132 bytes
SHA-256: 90b8eb39878c1bff318443f52a5967ccdaf645743a0ca20b154355b52ea0d5f2

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