Malicious PDF — malware analysis report

Static analysis result for SHA-256 423b830f88f342ac…

MALICIOUS

PDF

71.0 KB Created: 2021-02-18 08:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 25e435af3553a636e5fb8f7ae7fe4a88 SHA-1: 9f9b03da822d78033bdb12fda1c0ecf67ce72fea SHA-256: 423b830f88f342ac2ba5a3c74a6c309ec3f970a2b28df0bff4fe5073366a2f76
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/123?utm_term=briggs+and+stratton+450+series+148cc+oil+filter PDF link annotation
    • https://cdn.sqhk.co/tezikegoj/2Nidpgf/57446595718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464702/normal_60233349f0ca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_602c590d593ef.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/hNYiihf/candy_crush_bubble_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fcaf11b06f94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_6004be42a6122.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403948/normal_6007e237d1335.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/aEBjeij/miralax_vs_metamucil_vs_benefiber.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372087/normal_6004d4d27b1c4.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/ihYiagg/marco_s_pizza_prices_venice.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_602d8f33d10ef.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/rubidokezive/36405923490.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/backup_line_chat_android_to_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/potassium_phosphate_dibasic_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/91523119685.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_off0000d714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD714 5836 bytes
SHA-256: 295b395f6585bb6f4f79b1af0a83c7f0fa2b71fdceb4ef11491e70a971b77b3a
font_01_sfnt_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 10636 bytes
SHA-256: f5ed6592d4912bb1479c0a44f11154b082de28f12d224e3c3e7c8817b2ed02f6