Malicious PDF — malware analysis report

Static analysis result for SHA-256 509f2c7dd9fb0acb…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 03:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02e1f1ed59b1f83e4c12de4fbc81821c SHA-1: bee8dbbd85c649f051e96dd53884060849475fbc SHA-256: 509f2c7dd9fb0acbc3b9b7b41453a3b27061a8af72e58f76f21d9858b764fc0a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a high ML classification score, consistent with phishing or malware distribution. The ClamAV detection further supports its malicious nature. The document body, though heavily obfuscated, appears to contain text related to a book summary, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/award?keyword=nie+boska+komedia+streszczenie+pdf PDF link annotation
    • https://cdn.sqhk.co/bolukawet/MMIPhhi/63321981168.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/d8jagdR/barber_clippers_prank.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/bXgdqgg/ludo_king_tv_download.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/38159901821.pdfIn PDF document text
    • https://cdn.sqhk.co/rasirise/gwrjczo/65821479992.pdfIn PDF document text
    • http://whowill.ru/58102894351c4a7q.pdfIn PDF document text
    • http://mainsale.info/1416284495304f2y.pdfIn PDF document text
    • http://levantegroup.net/bitelagifudipozefvmfhe.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/memizusun.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/R1ii0Qw/77205225198.pdfIn PDF document text
    • http://meetsucre.pro/tolijerakojuwamanudomm0hb.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/sowirutelevolur/43009174945.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/pneumatic_control_system_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/nonfiction_book_report_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7babf51-6d24-41f8-892b-62fdb9249936/the_birchbark_house_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fbf21c2-cb15-46c6-b3e2-3f0b43278283/where_to_buy_metal_detectors_in_store.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/aw_tozer_quotes_on_fear.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/bumoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ebb9ca8-313b-4ceb-b1bf-97444d6f3246/92507887460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36adfd9f-3eec-40cd-ad1d-45234511d538/89675926169.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/domain_controller_certificate_template_unavailable.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/amar_chitra_katha_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/statement_of_fitness_for_work_template_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20dabb18-f191-46ff-8eb3-7555dee10b9b/how_do_you_program_hamilton_beach_flexbrew.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_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 5492 bytes
SHA-256: 7408376f83a5a5ee343812253b3f960964afe4641f1a9e56b7ddbd17f21c4351
font_01_sfnt_off00010595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10595 12732 bytes
SHA-256: 32848de0189d54e212d3d8a8938757c1a84075e4cc9209f290785ffae31a8cd2

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