Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e76c4bb0322a65e…

MALICIOUS

PDF

78.5 KB Created: 2020-11-20 05:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4a117e43888be9fafb11b28a791b35f9 SHA-1: 0b0765b5cf81b88ba0e2a5ada4b46dc1d01e73f7 SHA-256: 3e76c4bb0322a65e80be064769e0c9305d1e044ca75183d843b03a3c71400f32
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://traffine.ru/strik?utm_term=nier+automata+save+data PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5fa0dcdde150c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f9de7938c5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_5fb28a894e594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f94ebeb3a5ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f88f89072fc9.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/gozilum/simulation_arena_9._0_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650dda60-6000-428f-8d27-4a455c22a19f/tezufapadasimeposajerinov.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/28006507707.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/ca-2_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/512ebd0c-a63b-4242-b869-6a12d8304936/boxhead_2play_rooms_crazy_monkey_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14e2bd1-f235-4145-9145-7b6a90baf4af/multithreading_in_java_lab_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/pdf_to_word_macedonian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa8d07d-1a46-49de-b653-8ab62aa175df/wow_bfa_feral_druid_pvp_rotation.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_off0000f5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D5 4968 bytes
SHA-256: d78b028d8d77d403b622aad8a5a3bdb99e69e985b89f172af9a72c728d11523a
font_01_sfnt_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 11280 bytes
SHA-256: 04bcec5917ccd9d88faece628054c4da9d60c79f672d46354272ccfa74333a91

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