Malicious PDF — malware analysis report

Static analysis result for SHA-256 c237caaba4964bd7…

MALICIOUS

PDF

76.5 KB Created: 2020-12-24 20:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7147f8921be89b1e7f5e923463e381ec SHA-1: ec9146a4d747995031e3dfd3b5a1cd0c6b0b8ddc SHA-256: c237caaba4964bd72ca353d42565d0b3de59ad97926696118042acd44424c253
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 0.9998

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://trafffe.ru/strik?utm_term=penguin+simulator+crazy+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5f8e9e34579cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f94e03443c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_5fbf076550881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5fc097904d13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5fbda2007dd28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_5fad7d32d7925.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/1a5f21e6-0b7a-44db-a3e1-68d5cb749f42/16710709510.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/simple_business_plan_template_for_restaurant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6222f4b-023f-48a7-8ce1-4979f0ae30b5/gekukiwutewuguku.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/95158215418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d92dd18-1994-4683-b312-65f0d177f05c/37410162039.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/84765400963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6e104c-ba31-4e67-9b40-29ba29793587/30320078550.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/free_art_apps_for_kids_color_by_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc5d912-7b59-40dc-9be7-5d12cbfd8369/74653272170.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_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 5272 bytes
SHA-256: cacab7cbb0388ecbe1032f1d69f88abe57715e5731ded164148120b60413d874
font_01_sfnt_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 10340 bytes
SHA-256: e24cd029d9664434c59ae0ca83485dffa35e7076aaedd02fdcc7ed9f3eadfa08