Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6916fc7ac13596…

MALICIOUS

PDF

73.3 KB Created: 2020-12-07 08:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d5fa6510d1834651dc94924e12f7e007 SHA-1: 708101f29c861747a69cc60ac6ed7aeae044396d SHA-256: 4f6916fc7ac135967689be4ef6a962d1c27cccfbf429f407eb70f12d389d2376
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://trafffi.ru/123?utm_term=replay+the+history+of+video+games+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5f904076a37fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f8e3538e4908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5f93c6a77b991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5fc815334eadb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373508/normal_5fca7bc82322e.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/dinigugaxej/76136934766.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/36491304461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49075dc9-4ae1-449c-a772-d27a1d66859d/minecraft_forge_14._23.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/scholarships_college_2020_homeschool_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/brooklyn_99_season_6_episode_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a37af45-7b6a-4478-8a76-8c21ee57473f/bomumoxomo.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/jelov.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/woziwo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC867 7560 bytes
SHA-256: 899d02bd2ac645ce5a2db86be428f8f0c081f84649c8007f96c70642e0db3a0b
font_01_sfnt_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 5624 bytes
SHA-256: 6ad310519363beb80c11350688289cdf5f8c0e604eeec02707fc81a358fa41a8
font_02_sfnt_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 10436 bytes
SHA-256: 85f40008ccb9b4bf0ed414e32054cfac814e4dac81a524c8df85500cfc7f5f10

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