Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c7b6bac06f5dbd…

MALICIOUS

PDF

69.2 KB Created: 2021-05-23 09:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d5e3c447b282cfa450c83bdbde3be476 SHA-1: 22072964440dea39316b22dc3fecf52b2ab2af81 SHA-256: 43c7b6bac06f5dbd22099a0eb3c8db32005a4f0d72b6fccd22abe5bcadb8b249
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://botokaw.ru/strik?utm_term=what+is+banker%25E2%2580%2599s+algorithm PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fea3572a4362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_606e9b0fc5205.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb829251-44ae-4068-a187-2c83efa9b64f/volvo_penta_sx-m_outdrive_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9cc0bb-b058-4010-b2e2-d2304f53952f/5278163599.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/rosukokabovupafevabu.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/vosugomisomi.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/jirosuxufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b003b8-7afd-48ab-891d-e42e100fc34e/accelerated_reader_lexile_conversion_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76839d14-cf1a-43ae-8259-52e084398767/the_hunger_games_catching_fire_online_free_123.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/95033366565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c74992e-f75d-4ef2-94db-da59c60bb2f4/mtg_modern_deck_building_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/how_do_you_soften_hard_beans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41cdc27a-2d26-48f0-908b-3a8940f0e599/79390186074.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/los_100_verbos_mas_comunes_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/17559617329.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/18403580262.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/who_guidelines_for_food_in_covid_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1091d703-0fa9-4986-89db-8c2339d99a20/10656412457.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_off0000cf20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF20 5368 bytes
SHA-256: 668bb6ee754cdd65f52b64c31bb9bfd4fe02d7f36b6e21baaf8196344fbc7239
font_01_sfnt_off0000e152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 10784 bytes
SHA-256: 95fd75cd9a2cf76786a29499a13bb626ebd8ad7d4b55cee23bf704bb80cdbe26

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