Malicious PDF — malware analysis report

Static analysis result for SHA-256 415bdde0149f8649…

MALICIOUS

PDF

74.9 KB Created: 2021-01-01 23:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ccabb23328ed8a05251fdcd8a5e6f496 SHA-1: b3730d90e373e20a8109ed2e4cbdce9002a68e10 SHA-256: 415bdde0149f8649c8abee7215eb0599562ae50e35c7f4e0bec08977bbf6b718
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://ggtraff.ru/123?utm_term=physics+vector+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f89061940af0.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/fvjeidX/vuribavabupugobefenix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380237/normal_5fee4ab161749.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/NBjjH24/komuvinaluxuvipe.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/4e414771-1415-4816-825f-ca8833d7e89a/38041005706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b428c4c1-de74-4bf4-81e8-007260645c8b/zijonovopurimoleki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4036d4-50df-4cc6-977c-1da7b3177d21/tie_dye_shirts_for_sale_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb20c42-ab7c-4442-84ca-efd0bb3cb81e/tableau_double_entre_maternelle_gra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95a91b2-d160-47e1-b520-7221299fc730/who_reports_followers_analytics_for_instagram_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de17ce6-09aa-46db-bc5c-a4fc6506dfa7/2182744879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9215db47-65cb-45f0-9230-82c65ea41779/adjectif_allemand_liste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e353d4-123a-4f7c-9124-4802c7c0d581/zerakeginevexojalajalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f9621b-0167-401f-9166-1f3502407ca7/lauer_custom_weaponry_contact.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3d7cec-b1e3-449a-96d4-cbda2ce5c1d5/47012446309.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_off0000e91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 5172 bytes
SHA-256: 63b9d5648ce6bd715a04301c0594c78cd6b392b9daa1f9e6dd616de2941998cb
font_01_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 10544 bytes
SHA-256: cd8f49306808c43b9696aee849efa95afc0974cb1c5afac86000a38dc0876b31

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