Malicious PDF — malware analysis report

Static analysis result for SHA-256 c632a614744c7983…

MALICIOUS

PDF

61.6 KB Created: 2020-12-04 08:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4bbd0c0ae94c782205cda27824a2a4e6 SHA-1: 5bd7e2b5a981584dda6cc1c83b180bbf72403569 SHA-256: c632a614744c7983e4ff2e17ed32185a6e8475e08e3bb2431930e8f753b69fce
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run 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 0.9997

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://traffnew.ru/123?utm_term=diagnostic+policy+service+high+cpu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f909a184c069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5fb6babe413cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423732/normal_5fa916131dc17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fc63cea265fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448137/normal_5fb67ac7b53d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe48a3173fb5383b6f180b/1606305956907/vubebexev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f3af1c8c741314320bf8/t/5fc5b50dbc819f1cf49e2f39/1606792461229/99791361496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51219b38-a751-45fd-9a88-6350f2437a1b/lasalokiza.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/81076720697.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5211dec917750a3f31b0b/t/5fc727c81d106d256bbd3e26/1606887369063/niparobizulakitiro.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/59946027860.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5aae9affbf90a660b10b8/t/5fc92d6f6b9c1c6e4defffc7/1607019892025/cute_toenail_designs_for_summer.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/the_candy_shop_war_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/pdf_to_word_i_love_my.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a3f3d26ff1194f7eeae9/t/5fc37c7d6457125654a8ba50/1606646913968/43828297594.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_off0000b54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54A 5356 bytes
SHA-256: fe119c3af6110212fed0f6abff96b4d8499d8b875a5c736ca2e0dcda5a850255
font_01_sfnt_off0000c796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC796 10064 bytes
SHA-256: 8153a8234a248278d9feb177f50f8739b728aaac0451c1852420c2926ce58427

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