Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ebdcada034d1ce…

MALICIOUS

PDF

66.3 KB Created: 2020-12-30 11:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 20b8589de7a369619a9acd57d7b07e28 SHA-1: 51d9085e68b0afc3c02ba477ce08d418b5948be2 SHA-256: 62ebdcada034d1ce50e3b530678ea712f7df7f7fd6ed58d3762348c2958a0b85
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although the document body is heavily obfuscated and unreadable, the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/strik?utm_term=labyrinthitis+vs+vestibular+neuritis In PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/1784329.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/9731385.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/38f8ab78-bfd7-411f-80b0-5745beec4560/lasobavuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9012166e-bb83-4b5b-81f3-3967c8c8b80a/mujutijoxikibegafabapal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed579ae7-7c87-4dc9-99a0-6199388c0bd2/5277552708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951dfa11-506a-4013-b268-343b60d6cd1e/pixifekoden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b9ecc9-e0d7-496b-b086-4cdd68a5cdf9/patologia_sistemica_veterinaria_trig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260506fb-8c3d-47b7-a37a-2a8ca0409605/290181757.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_off0000cbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB6 5016 bytes
SHA-256: c79f02dcc54304fd0f345afd74719a679b208284702211e83ba9858a4fc574ad
font_01_sfnt_off0000dcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 9404 bytes
SHA-256: 206aadeaa690f38ceffc7f2084afd4d05d6041b637b4a7f491fab251812dbed4