Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d9dfc72f35e0fc…

MALICIOUS

PDF

63.5 KB Created: 2020-12-11 14:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 56c0b6627310985ce7ec1b7c4de3be77 SHA-1: 9b3a39a36972e31f5d64ab067269985f6577bede SHA-256: 24d9dfc72f35e0fc5967d53ae6b0f914473f51edfd1d129b98db4f380e9af5ed
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=planet+fitness+tulsa+riverside In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418369/normal_5f989f6fe2672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365601/normal_5fcaf79c66987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_5f969e684fb48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_5fb2b6db8b6de.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/5fc1841dbd14ff0dd2a1095f/t/5fc5f2801972c46e3c6b917c/1606808193233/gucci_guilty_pour_homme_90ml.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4786a5-8a8d-46ff-a510-faf0601e0b1f/38282239777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca550222-2d47-4a90-9d41-d39963b14650/18546836279.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf498f145a8629dca70fd4/1606371728218/living_on_a_dollar_a_day_lesson_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5a058b-ba0c-4bcb-af43-901c4617d6a3/kadagufesofogepol.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/nerutanabebaronipokapup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709f7046-756d-42bb-b0da-11c2a25d63a5/97033919063.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e925ea4a794d56451110/t/5fc2c1fda97599144e5294cd/1606599171936/56916444884.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf60b2f8cdb769c6daa019/1606377651102/catholic_parish_finance_council_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285b94a3-41dc-4d34-a716-aa43d41a38b6/pewobizabuluk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d2a4df132613bbd6bae0/t/5fccbe9f978da30c56faa8af/1607253666352/sexapevaviritivuput.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_off0000b8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F1 4960 bytes
SHA-256: 6575b9a9497e1da1ab22467111c418b9dab01b9bee2af9d7704efc980f068025
font_01_sfnt_off0000c9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E8 11972 bytes
SHA-256: ef8e1a12b8f300e4d7eae4bb1819de828491c3ccfcbeca468a6fabe11456437d

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