Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a679700ed7db88…

MALICIOUS

PDF

69.0 KB Created: 2020-12-04 20:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9e5f8bfc3e3ad1502ccf10637d08f4da SHA-1: 61e041530126bcec342ffe77e41ea03e0ebe6dd8 SHA-256: 98a679700ed7db88446d2781002dffa65b2fa6eb2e952b409739f6abbe753f81
124 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. It uses a callback-phone (TOAD) lure and an invoice-themed 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=command+science+secondary+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484355/normal_5fa8c526760cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_5fad577fed966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5fc7394fdb953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f9619c6202ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_5f9ceec649554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f8b70a41da66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5fca76b2f1dc0.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/39934c0b-588c-4739-a5ed-609827a0f947/19263707413.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfcb52c6de34c7a38ef50/1606220983948/napinetitewatalukuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53495d60-fb5f-4e18-8c3b-2dbd73636c50/jugawon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c128471-8041-474a-a400-4f5dde61c9ea/mileto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51311e2fce462bca6cb6b/t/5fc7dbe30c1192064a0ac035/1606933476858/project_management_methodologies_agile_waterfall.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0edb38787e879896c1e26/t/5fc52c2beaf37e3b64434fb3/1606757419942/17358844988.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_off0000cfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA9 5188 bytes
SHA-256: 40169710ad667422c08a1be7a09cea796431d115d6f29a2051d87064a4ddc162
font_01_sfnt_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 11100 bytes
SHA-256: e144cbc7e6272e6e38c2d80d07f2b4e20e80096acee44c688d89df7e16028b98

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