Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b085339ef1bbbdc…

MALICIOUS

PDF

68.6 KB Created: 2021-03-15 09:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a07a0fc1c233f478293ba85040c9d6ef SHA-1: 7b2714972168cc36c52de31f9944e4d40db776b0 SHA-256: 4b085339ef1bbbdc5b6fd7b65efdbf1a995176e612b4e6d560e6845cd9628b87
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'https://xezojetit.ru/123?utm_term=android+bottomsheetbehavior+states' was extracted, suggesting this URL is a primary component of the attack. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and Qt, which might be a distraction or related to the exploit vector.

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://xezojetit.ru/123?utm_term=android+bottomsheetbehavior+states
    • https://cdn.sqhk.co/xodawakadude/ghFoiis/similar_triangle_worksheet.pdf
    • https://cdn.sqhk.co/videmixolute/jfgcdpA/normal_pituitary_mri_report.pdf
    • https://cdn-cms.f-static.net/uploads/4451737/normal_602371f4c82ba.pdf
    • https://cdn.sqhk.co/mimizajig/f7hjfF6/food_wars_season_2_release_date_on_netflix.pdf
    • http://milanbeachs.space/22916886286rtk9t.pdf
    • http://getliterate.online/cystic_fibrosis_treatment_guidelines47zx1.pdf
    • http://uorott.com/bilikekufasipubaxujujzdo4.pdf
    • http://4kuhd.me/can_you_trade_options_for_a_livingh7yri.pdf
    • https://cdn-cms.f-static.net/uploads/4371247/normal_603ebc6476c82.pdf
    • http://on24-system.club/hayward_power_flo_matrix_sp1510z1xehc_parts9d71r.pdf
    • http://rituralajozeli.iblogger.org/25212121185.pdf
    • https://cdn.sqhk.co/luwivimexu/ghhjge4/kigejelipufiposepa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sikofus.epizy.com/outside_magazine_winter_buyer_s_guide_2019.pdf
    • https://s3.amazonaws.com/rezugekolaba/zefidodoterujug.pdf
    • http://jujavusuf.epizy.com/33921051188.pdf
    • https://s3.amazonaws.com/xirixepo/92361589384.pdf
    • http://sugoxusegisefiz.rf.gd/coachmen_rv_sales_ontario.pdf
    • https://s3.amazonaws.com/rexogeguxosix/wwe_bleacher_raw_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc9.bin
ae72565bc426bf2d7f75195fbb5c50239e053969ce140b1e854790a8bdcf328f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC9 5224 bytes
font_01_sfnt_off0000df60.bin
6224302588ec864d76e794c660d2fa0545c0dcc849c23842fe1cbb5e2492e1f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF60 10604 bytes