Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ab31ec5a1365f3…

MALICIOUS

PDF

69.7 KB Created: 2020-11-18 22:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a0b0ec3d7793aa85edce1d848b761e8e SHA-1: 533b3fd18173e9bf53fb0ebb7dea401875e69e3d SHA-256: d4ab31ec5a1365f3783557b00f2c90b034466a4939eb79a940993ebe23fdbc70
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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://trafftec.ru/123?utm_term=what+are+the+five+components+of+writing PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5841c40-849e-4705-8740-b6e5e36c0127/determinante_de_matriz_4x4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31601de0-6bda-4203-9313-28b8f6f67da1/xepivevibivuladaxitugivem.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/ap_interim_budget_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02f9890-3dc0-40e5-8411-a0dd0f9d5793/47823823741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a17c9a-45ed-4ecb-bf3f-72722911d827/zusuzinudesal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5b6ce9-a544-48da-865d-7b8a8b32a838/pazulomopomirunud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b68a52c-5ec0-4181-a771-23234c456980/dotowobiderative.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7157ab41-b6d4-4d12-bde4-c64a9b1a66fb/cranberry_punch_with_almond_extract.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a0c388-11dc-4e03-ba0a-7d3b4ccba6b0/worufavev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12544621-0114-4f9d-aeb3-36ab6f031e27/breaking_dawn_full_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226a145a-6785-4757-b498-4ce13474fa83/my_pt_hub_client_email_list_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28eab7d-7a97-4d6b-ab13-76ae922b02c8/47807476551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41da2571-889b-471a-9984-fe975774bfc8/wusopuwaralareziwakenef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac5dfaa-d303-44fe-82f1-7e0e2c3351e0/tomewolokudamadopaf.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_off0000d1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DF 5560 bytes
SHA-256: 26624bc89efc0fd744c8096be0b29c307d4ed33c2e535e7fc8aba8dbee52c380
font_01_sfnt_off0000e4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BF 10524 bytes
SHA-256: fcfcf65da94dc787e82062ce9286b357604633e6ed1e184b1f268ebf14e89e7f

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