Malicious PDF — malware analysis report

Static analysis result for SHA-256 40051cb68341c079…

MALICIOUS

PDF

75.5 KB Created: 2020-11-11 07:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 54e15ef04c6706b2b81c9ad25540ad92 SHA-1: d2f8cdfc493fa4d983ac63e5b6ffaada899548b1 SHA-256: 40051cb68341c079e044cb8601d6310ab8693ac2021d3b60b23c927c50547e83
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-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://trafffe.ru/123?keyword=similar+polygons+worksheet+kuta PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405639/normal_5fa7b356135ff.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/jepavilutabilel/rogue_x_men_movies_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466fcf51-320d-45fc-a3d1-f359bd8befc1/13948748473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef961b9c-4202-4f1e-96bf-473462db2bbf/manual_mip_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/kazogarinekeduvisivosajo.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/linux_administration_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a82c922-8f63-494d-be77-4d8aa2c566a6/sasogepodokedipen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1256eb-ca56-428a-bffd-aa113d21c34a/fafodiful.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/2008_toyota_prius_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdee6797-40ef-4060-91e5-a757a96c8d72/gabepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103804ba-f3d7-41dd-aaad-0dfa3dfd1710/widozudaxawedokoguzel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b999b4be-8838-4847-a8e3-07d03127258c/cheat_engine_chrome_web_store.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_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 5476 bytes
SHA-256: f006e5db3236c78cddcafa8354ac4f9ada0bfa32e4826333bcb87789c8faa179
font_01_sfnt_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 10516 bytes
SHA-256: 5c9f2426e1f3df75721c599ed5cc32dd5e187d519a95860d2d0b2b7457e08bcd
font_02_sfnt_off0001131c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333