Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a554bbd012c0d3…

MALICIOUS

PDF

83.5 KB Created: 2020-12-26 06:07:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4ba82751d3985bf4bb8d3b2180ed40d2 SHA-1: ebcb061223eb5c3b1af5e5ad3a255eca3f1b2c2f SHA-256: 66a554bbd012c0d3929affa1fbf897368791bbf56e672043115f1557522668fa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, potentially related to a phishing campaign.

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://traffnew.ru/strik?utm_term=spyro+reignited+trilogy+crystal+islands+gems PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453889/normal_5fe64270e4b9b.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/8ujgift/23230695916.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/SnkS30o/3d_maze_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/Ohggchh/posukulejakefedobugaw.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/Q4jh64q/wagor.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/e9e34e6a-847f-462f-ba51-8e7749a6017c/93603994618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e681e30-8922-4e05-8c73-25ad90e42f11/winevudejizinuxew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d79217-e3b7-49b4-8836-2c55f1aeba0b/kekugawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b271d5-b011-4075-854c-1aab4ed33eb1/lycamobile_wifi_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a823e6-7777-4ae7-955a-318e5f42bfc5/monixesej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f0794c-e6e9-459f-89cf-e5ffe73a2538/52730763450.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_off00010a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 5600 bytes
SHA-256: 38dd36e13167fe70294ab74bd8bcb5986b4b3c10be8fee803a173ce28d29ead4
font_01_sfnt_off00011d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2A 10500 bytes
SHA-256: 57f5145c01329247ee6a9d4cd09f18e36a13d139cbd6846014977d81c0909b7d