Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef82fb8b9ceffca…

MALICIOUS

PDF

65.2 KB Created: 2020-11-12 22:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: edef60ef17a79c03a8784e56ac87db4b SHA-1: 2953c91f652f533b95aa8bc314b89fae923905b4 SHA-256: 9ef82fb8b9ceffcae8d7d459bb23ba63b294467e5f9725770e6944666528b322
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://traffset.ru/strik?utm_term=a+long+walk+to+water+ebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f872765160f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5fa6595a8cacf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_5fa2f0b3d3866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379371/normal_5fad28e2853a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f9a958f272d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_5fa4d7b690ebb.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/882ed085-edd6-4cbf-acb4-ba6f227bd920/17426653529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af798120-212b-4676-9615-17e762e02dd6/xefufulole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4485e32b-77e6-45e9-8019-94438c6f362b/unblocked_games_corner_tank_trouble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63100fc-2c07-4073-8165-af36787d23be/32600153116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e57394-4b6f-4dd0-abf6-5606ec593f87/77619371643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad078d42-1df6-48d3-9219-4b7d77620d12/rowatigipuderurisuzax.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/monster_hunter_world_mega_nutrients_permanent.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/madivana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5876fcdf-b53a-4d2f-bfea-2a0cc6a20259/functional_decomposition_diagram.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_off0000c4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A7 4960 bytes
SHA-256: fd1c717940e1258e8c4d9176365814e6b1b11346e285dfacfd3fe7fc6efc246c
font_01_sfnt_off0000d5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AE 10044 bytes
SHA-256: e26bbe2658f8391658cf094b135ffc42b63f84cd9a606d7e1055e4fb4faf95ae

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