Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33f22ab8e246cfc…

MALICIOUS

PDF

76.9 KB Created: 2021-06-13 05:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6d92b2efccb0b4a08dc750ebc209abce SHA-1: 239aeb73e16f2623ef4ea5a800247443f2c2e772 SHA-256: c33f22ab8e246cfc023c53f3987fa2ad71304b39f954f5dd2736f15168e20bc2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9997

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://ponafet.ru/123?utm_term=no+excuses+book+brian+tracy+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466673/normal_60470447b47b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488574/normal_60b7db14e39d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_60293645af428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5ffbc6a00a139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369152/normal_5fe11d4d35fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_604ab37a9a023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_60184cf9616b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426408/normal_5fcb2bfe73369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393776/normal_60074d57ed96e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_606c981b99455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483867/normal_5fd19334bee84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481819/normal_5fee53bb3a799.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447912/normal_5fc8258fa587c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454426/normal_60333f776be39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383304/normal_6005f53a1b0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_605f2c2978499.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4372355/normal_60b6b53ec2f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448985/normal_603cc10a0bbce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_600fe336ac83e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409628/normal_5fe4f08b3fcab.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_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 5460 bytes
SHA-256: 25eed922f79b4689953dd725f377ff7f9a3e41a500e80c22cdc6fe197e82205d
font_01_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 10924 bytes
SHA-256: 80e3a8df5489591ee2f0fc67adb0ff6168dd8b3ac1255ad271ba321109cf96cd

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