Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aea8616c553e412…

MALICIOUS

PDF

68.0 KB Created: 2020-11-14 07:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 579d45eb09a005d3302eb5fcf492c882 SHA-1: 2b858d083b8b890ebc912422058dad094baae385 SHA-256: 4aea8616c553e4129aa811ecce4c09a512dbc90112d38e241d4be3f681e87b7c
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://trafftec.ru/aws?utm_term=antigenicity+vs+immunogenicity+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5f9e7ceb45650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_5fa91cb2d8828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5f9d970e709da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f9159d3c3223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_5fa94198c1565.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wopari/30495493039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b21bdd4e-24d1-4c84-af2d-4008ff2f567c/nds_roms_mario_kart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7aca094-c6fc-418c-92bc-aff66d3dc2bd/uber_social_media_fail.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/vexing_dodger_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd05de67-5797-4226-97d4-3e7ff0435c05/86816550436.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/kokoro_natsume_soseki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc7afca-3473-45ef-bf96-3c6be3fd3f25/laxigidareduraxufot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fa9889-3a37-4d41-a8fc-d67711c2760a/19418195910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003eee8f-404d-4cc6-b5c7-8b1e2067e5df/venus_mcflytrap_cosplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cced6c-fbac-430b-8cf7-de2bdd705983/zoliv.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_off0000bf95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF95 5172 bytes
SHA-256: e7e9cc748ae83965935eb62ae6bed3f6793684064cb88d65332527600770c7f4
font_01_sfnt_off0000d132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD132 10548 bytes
SHA-256: 1ed68c8737bdf4887999f38e611777e7fe8d7ec4ab43c45c142507523a9796b8
font_02_sfnt_off0000f51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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