Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1199db2d5eff91…

MALICIOUS

PDF

80.4 KB Created: 2021-02-28 10:47:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b908cea1fd7fdb60fbbaeec2e2fb6dd7 SHA-1: f4e2eee69e64b187570d66e1a3607f8a5ef4d3f1 SHA-256: 9e1199db2d5eff91f9f6598b4f5962fff1291d1defac11fbb67f87ec31d981e9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://soxebez.ru/wix?keyword=master+cycle+bike+trailer+how+to+attach', which is likely used to redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to the URI's keyword, suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=master+cycle+bike+trailer+how+to+attach PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497658/normal_603806d23f807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_60172382561dd.pdfIn PDF document text
    • http://50offshop.pro/apology_letter_format_for_schoolfi4w3.pdfIn PDF document text
    • https://cdn.sqhk.co/tigufarejeti/RU7kfnQ/57877625491.pdfIn PDF document text
    • http://wspring.space/periodic_table_black_and_white_201730c5g.pdfIn PDF document text
    • http://subfamjtii.site/graco_lauren_convertible_crib_instructionscbq5m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_60108f468c481.pdfIn PDF document text
    • http://cocobuka3.xyz/gujakabugokumejuxi419sb.pdfIn PDF document text
    • https://cdn.sqhk.co/vumatoxikom/hhgcici/auto_clicker_for_mac_free_roblox.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/pelipuwubegoruxeduga2m2p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497093/normal_5fd03ef09822d.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoverol/5Qhciik/1378859780.pdfIn PDF document text
    • http://sexesex.site/fire_emblem_7_save_filedyyga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/purixifusipelid/boom_boom_dance_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/modelos_de_diagnostico_empresarial.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/jabutixoretaguvofomafo.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/42493007278.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/63463296.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 4972 bytes
SHA-256: 11cfaed06d5e31dd1d9d1ceeb991f940ff87fa16e22bd621f3926b4bbe886235
font_01_sfnt_off000102bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 10316 bytes
SHA-256: 9f007f3a9d63909015ca5e5cbe8d58a86a60ff34b5ce01cc73302359e9952004
font_02_sfnt_off000125d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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