Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca69c545a5b3671…

MALICIOUS

PDF

75.7 KB Created: 2020-12-26 18:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: de785a3d76a504043957a3aaf2cc83d5 SHA-1: 9b8062d12bb78c67fa7909c82b1bc524e2a51ade SHA-256: 1ca69c545a5b3671be08b8aa70d6c4690624e7c2452f6a528f323c08d8fe5ea0
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a file hosting service, likely intended to deliver a secondary payload. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=arma+3+multiplayer+crack+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5fabfbb6a505f.pdfIn PDF document text
    • https://bojamaluzide.weebly.com/uploads/1/3/4/2/134265872/465245.pdfIn PDF document text
    • https://fojaxusulilunud.weebly.com/uploads/1/3/1/3/131381134/zavoluretitemajot.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/6b2cfdf0-e8f2-4e4f-9a51-321c5232f515/case_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/61786537605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621e2bb0-a28f-4421-bce8-ab0ed9b5291a/vokagixomoluparesik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594aec17-b991-4a6c-ae79-c68b821fb0d8/70507032279.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/vampire_batman_fanfiction.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/tipom.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/backtrack_5_android_apk.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_off0000df07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 5452 bytes
SHA-256: 2d159e7f6a7c2435483433e55612a032270b9998ec04f6017e12ff2e53835e78
font_01_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 11840 bytes
SHA-256: d8e588f723bd95319806ab835962df0ddbc0ba9fdc9cf7d554a3a2b996769ea6