Malicious PDF — malware analysis report

Static analysis result for SHA-256 480ffdcdce7e9883…

MALICIOUS

PDF

67.4 KB Created: 2021-01-03 17:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 71ea889c894b66f016f7077c4398a2db SHA-1: b715be2459c6aa7f0128793e0585017598109c70 SHA-256: 480ffdcdce7e98832f7d1a91cbfca711d356593c4201bc669e8cbca549e7486a
104 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=jefferson+county+traditional+middle+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5fa2dc9e70796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460680/normal_5fcda939e0fcc.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/Oieghgi/safety_inspection_apps_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_5fbb6c2ac7f78.pdfIn PDF document text
    • https://cdn.sqhk.co/sawusuzi/qibhhpJ/texezosirigiwebusido.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/8ieheia/scp_096_modest_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/vateviti/ifzCheo/61006988212.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/60712756987.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/16021538547.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/les_4_accords_toltques.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/smarter_way_to_learn_javascript_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd35a55-3061-43d0-8072-be265d9a4be5/dragon_quest_11_strategy_guide_prima.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/videohive_transitions_pack_free.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_off0000cad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD7 5352 bytes
SHA-256: eb7aac967f2439e5a8afb6f67e169385bd121dad881e9d8545e4949c95e0f120
font_01_sfnt_off0000dce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 10576 bytes
SHA-256: a51921d49b847cbf6dc8046f0b1bc1e6c4430f498044acae0dbf0c6b935177c7

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