Malicious PDF — malware analysis report

Static analysis result for SHA-256 84816977d1a28365…

MALICIOUS

PDF

80.8 KB Created: 2021-03-11 21:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 16fdad88a948247f8d3b04bcc7bfab38 SHA-1: 52c5b869c35a8758098035a785d79b47478b27e0 SHA-256: 84816977d1a28365ad642d3deaae3297bd233c2dca1b0f7d6d40bd025120e4f2
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9992

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/award?keyword=techniques+of+balance+of+power+in+international+relations+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417426/normal_6046d7d72e6bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474470/normal_603712c34b086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_603bf877d38da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411491/normal_5fefc8efcad3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425235/normal_5fcf3c9c0a226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fd676aa3a05b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_60347b78b7334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_6040a932be013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460460/normal_6023d0160d998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454281/normal_5fde0d75291aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489409/normal_6027627c45a0b.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/8537ebb2-51ae-4bcf-927f-eb6b84fc78a0/vip722k_dvr_hard_drive_failure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f6c736d-4ddb-4b8f-98e7-998db9512214/aws_interview_questions_and_answers_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8308033f-05d0-4a5c-bb3b-6b107aac8b9e/norudubixudazem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad59cd2b-924c-4867-ab31-3704e65fbf4e/sundance_optima_850_circulation_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a3941d-7e00-406c-b328-2dec496f96e5/80377593293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac458959-434c-45a2-bb53-0b72b0465702/xugananazak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c196a12-e1e8-439f-a233-396ee21c3703/50346315159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff52868-8dfe-4bbc-995a-8413f555a5e8/nutenapup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1351f40c-9ff1-429b-b955-2261adc519a2/fojeveremafovaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a61a8e-6a05-4da9-baf6-d14a69e9252f/13089861941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b561a5a6-8957-4cf4-9031-b8e1a9e7a7fe/20572253668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16992694-8d23-4592-9d40-c62a20056247/gatajudawefobuz.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_off0000fdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBB 5552 bytes
SHA-256: b779b26a94b166785e2aca2d48221e4bef0d0c7ef5b1672bf933b8556ae06e91
font_01_sfnt_off000110a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A1 10664 bytes
SHA-256: 499cf43f86b72f9068c8d071870f5685fe4a9e3f5151d44343da14b19847d3d8

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