Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cee2530c85e8785…

MALICIOUS

PDF

68.6 KB Created: 2021-02-06 00:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ac22e4ae28ce5a6c31739f6c9f3fbd66 SHA-1: f7bd52b92f8ccec29e840ff0fc589d814f8d4595 SHA-256: 8cee2530c85e878530b5e29f8c8d0c1e8b36080c9bc439468411746ff40fd6c4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The presence of PDF-specific heuristics and numerous embedded URLs further supports its classification as a malicious document.

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://leonvi.ru/123?utm_term=the+fall+of+five+epub PDF link annotation
    • https://cdn.sqhk.co/jopubelo/dzpZUla/gmod_scp_site_19_nuke.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/vhizjat/health_and_nutrition_coach_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_601bfd58e0f0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_600e57f7da515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_600a02d0ce658.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5fe3359a108bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386365/normal_5fc690522c73c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409797/normal_5fed46bb18db4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5fcdc797173a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fdef03841a28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369655/normal_5fc583fa1fe4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fd0a9d78fb65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471992/normal_60085a40a9d66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529024/normal_601dbc75277e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_601d2cbd1ff9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392868/normal_5fcba9c27bfb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_6011978c3e087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09C 4864 bytes
SHA-256: 0c7cb1b72c9a42a1dfb8270f0654e83b0dc27211d105ba05eb1810094c405818
font_01_sfnt_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 10960 bytes
SHA-256: 1d6214081d0b2697b159f1f7393dc958fe3301bb67b5ec25c66c3da64397d5fb

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