Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3e63d8756d3c31…

MALICIOUS

PDF

93.3 KB Created: 2021-05-30 01:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5ab8de78dbadd822807e846143bcd405 SHA-1: 4124ea3910dfde19924ac4227d32192429f838ac SHA-256: 0f3e63d8756d3c310e97dc1349dfea16f82b832d6089b19af280f9ce1abc5941
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, 'botokaw.ru', which is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to 'Principles of experimental design ppt'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

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://botokaw.ru/strik?utm_term=principles+of+experimental+design+ppt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409421/normal_60484600d0577.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456399/normal_5ff7cada434ba.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409256/normal_60b06cc330d39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_60066e15287ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484805/normal_5feb08bc0fd1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451551/normal_603b7ce8d51c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471691/normal_5ff7610b154f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_605d9024c3076.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/e8a3cc36-6691-42e9-bb3f-feec8c41019a/turedovoniku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d898941-c864-4c88-8a94-2e9aedf68557/pobofajegoretapoxomov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973e6782-3476-4a42-9ae3-8258b8fba0a6/65471822601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7ffaef-3af5-46b4-bc1f-b6077c1a210b/espn_30_for_30_podcast_phil_ivey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15f2b7b-4970-4049-b404-2c413c92d6db/31230716502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da44a0f-0cfd-4f92-9615-e5bb18604b2e/dikovokejupinelukatuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3854b446-aa72-4cb4-aadb-919895f13133/neziwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b3c8d4-1b77-4003-b9ae-3778f7fb5498/rawusutoxatikabavuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d7a812-2537-4821-b419-951957bc8395/apk_plus_portal_worlds_0.912.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_off0001227e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227E 2676 bytes
SHA-256: 2f56189d169570174b1a93b4f22c19228d63d69c43cfc0e0e5cdec31f509960c
font_01_sfnt_off00012e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E03 5544 bytes
SHA-256: 19d68ec9f457dae3c38d65af342bf2d95a119f8adc0d1dfd0fd677c63df8ae3b
font_02_sfnt_off000140cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CC 11488 bytes
SHA-256: c140f1a5b99544adba452daaca8fd6b335ac7529454e017460af0d59e4d2f5d5

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