Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f77b62eb8baf127…

MALICIOUS

PDF

81.3 KB Created: 2020-11-23 06:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0f180e2bc27a39e7e16a893da9200fe9 SHA-1: 973454238766ce12906a03fbe744e5423ee9600f SHA-256: 0f77b62eb8baf127192e83e85912ca6bd1bc6e50edf2dca8da6415a0a093a285
96 Risk Score

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://trafffe.ru/123?utm_term=incognito+the+secret+lives+of+the+brain+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420237/normal_5fb7a204b3267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451756/normal_5fa9b3c12fa8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_5fa7794d10165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5fa25213d73b9.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/dupula/best_non_boring_android_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3659a7c7-7186-44f7-b80f-b3a84039cc0f/florida_elt_list_of_providers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41eb5340-a4af-4ef5-93c3-54fd2688e1fc/96137032301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467ee7ff-98ad-4693-b776-6e514abfe76a/64900724723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4ac2c0-b8e7-42d0-b53b-c0c760463386/flammable_cabinets_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07184ad-47bc-429e-9c60-a7562450b016/74810831034.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/dunomuri.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_off000101dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DD 5556 bytes
SHA-256: 3a0339fa4279635371a5b3eb20c7fa0351c976571dceb4e067047444ad6e7ec8
font_01_sfnt_off000114bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BF 10284 bytes
SHA-256: a39520daa8c35b616e79835d22d2d90bab51f10b76e7b969c7c586f42574ba3c