Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc9d161094bd46e…

MALICIOUS

PDF

78.5 KB Created: 2021-02-21 01:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 59ab3bf7c38411c0cbb960fb38d077ce SHA-1: f45e56ca90fd5fd379835b5f1e03fcb3bd63d83a SHA-256: 7bc9d161094bd46eda1fc92ada51586e95f2b45e4b8f824a95260dbca9c89e98
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://baarspo.ru/wix?keyword=sam+page+mad+men', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL and the ClamAV detection strongly suggest a malicious intent, likely related to spearphishing.

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://baarspo.ru/wix?keyword=sam+page+mad+men PDF link annotation
    • https://cdn.sqhk.co/vibisimak/ijgdigv/diesel_trucks_mudding_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/vovigewuva/fpgekCs/retroarch_switch_controls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_60225a0e8ffa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_60113573ae9c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369651/normal_5feb7680ce49c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467586/normal_6002fe06332e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_60172c2e981f2.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/BdjfAia/whiteboard_drawing_video.pdfIn PDF document text
    • http://gratoraama.space/filosofia_para_mentes_inquietas4eriv.pdfIn PDF document text
    • http://scriptbook.xyz/wallpaper_for_android_hd_freeb59ko.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/kegubinefuda/bitlocker_recovery_key_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/crystaldecisions._crystalreports._engine_is_not_found.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/vejorafivamiwunuta.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/59375711091.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/narivusesidud.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/zubulizupajemafusi.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/kegegozoleki.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/activex_steuerelement_windows_xp.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_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 5076 bytes
SHA-256: 3b92058662618b53b725196a7918c5ecbdb0eaeab58824382c0c4e0901ae9554
font_01_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 14860 bytes
SHA-256: 951de8f32cf0b16ffc1906ac08d1a0677e46f6a83eec780e1ee737a5c9120dab

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