Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f43d84850b2cb9f…

MALICIOUS

PDF

78.2 KB Created: 2020-12-30 17:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 181e3177b050780b04a41bd55a2706e6 SHA-1: 6348c93205fab191de4acba4b11ff02279e29d0c SHA-256: 3f43d84850b2cb9f3b68877771329cacfddd4500371eb403cbd6639336199378
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 0.9995

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://traffset.ru/strik?utm_term=retro+games+collection+apple PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418567/normal_5fa69a6c94c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466673/normal_5fd298bee5c41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444874/normal_5fba0e7c81d1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f8f56c7e98af.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/427d8b40-2844-41cc-aa1a-e87490147483/planet_rock_africa_bambaataa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c51d66-af74-488e-93be-1f4087193151/alexx_banks_update_june_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/360_degree_appraisal_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/zirapemotuduvezuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de3f953-d8e9-487b-9e21-f7ffc3eb2026/merorijogewalenunu.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/dolby_app_download.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_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 5260 bytes
SHA-256: 5f8261c7b3c59aa1c6bcf7b11f4d19b87834839b06304fa0fb756b1143103ebf
font_01_sfnt_off00010744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10744 11008 bytes
SHA-256: bc9418d5678ba148922f8f60acf23d0a2ace07277e927ae86bf55182adebca2f

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