Malicious PDF — malware analysis report

Static analysis result for SHA-256 d264355b4460f3c4…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 00:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 896e8879835b563d95c93e4a1922b69f SHA-1: ee48659525b9a9f370fcb39d828afe8f455f8490 SHA-256: d264355b4460f3c41e50432842f22769e3fddd63a0dbaa3eec7a7c83b2ac7ffc
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 0.9997

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://golowaki.ru/strik?utm_term=first+principles+thinking+course PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370989/normal_603bfc98b5a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_6027eaca01007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_603f262cbdf6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_600ee4685e716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478131/normal_604a6a66ad418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_60018ac4e83ce.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/hbjjyig/hungry_shark_evolution_hack_download_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/tizarina/wiTjejI/bunitugiselelikigiwebuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5fd15aa41316e.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/dQhggho/classic_snake_game_full_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/ohheoKM/43818638061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_604e046b7d2af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414871/normal_60006a0718020.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/sazixipame/7398893634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1b0662-ca25-4d00-9724-91662d34e1c6/kinepatiwiruvuzufuruxadad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6074f728-c795-416b-8643-7263856343da/how_much_was_davids_ferrari.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/albert_einstein_short_biography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c141261-652d-4495-ae5f-1be514548870/95681579217.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/vesenelijulunipoxiruxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba08b6c5-7d28-4c27-940c-8df0c8757688/ncert_maths_book_class_8_chapter_4_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987df6cc-7c0e-4c52-be77-4aed50a01cf1/how_to_factory_reset_a_lenovo_thinkpad_t430.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_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 5004 bytes
SHA-256: 5750a00c6ae61044d17615b03f9d363a0af2e7a619cc52c2dca2709b66dc356d
font_01_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 10812 bytes
SHA-256: 127304c31cd6dadb71980f670847a8b4ec80953da0b9e2a48295921ea9af0b07

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