Malicious PDF — malware analysis report

Static analysis result for SHA-256 debeb81b9b5bfada…

MALICIOUS

PDF

72.9 KB Created: 2021-02-17 14:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 894187803f359dfcacaaebd5d49509a2 SHA-1: 53bff933ef16671d499afb442a2a64795aff678d SHA-256: debeb81b9b5bfadaaa6bac45397ce18cef35657d79822a2be8f1668abacc835b
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 0.9997

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
  • 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://maypoin.ru/wix?keyword=nora+roberts+pdf+google+drive PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450041/normal_5fefa802577a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_601e1597a07cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5fd727eede38b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_601dcaa7c7dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fd6787681fce.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/d5WsgfN/nikib.pdfIn PDF document text
    • http://reduslim-officialsite.site/95798067701lbww4.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/gicEDcp/survival_island_the_forest_3d_apk.pdfIn PDF document text
    • http://demask.space/freeway_closures_in_detroit_areai26lr.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/e2icuBk/54477265164.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/ic8ggqW/pac_12_championship_game_score_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5fd621a7dce09.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/zUnheid/16115355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_5fe8d215de84d.pdfIn PDF document text
    • http://iminn.ru/57076122487ukf24.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/wizuluworafid/oxford_english_teacher_guide_for_class_5.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/30860660419.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_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 5380 bytes
SHA-256: 776cf7634087c070ad716b477115e392f3ca817fbbc85ae5020ef5d242aabc33
font_01_sfnt_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 10080 bytes
SHA-256: 30e396527443b4f706a051348e2123bf7c41922cb772248c7fc2af232a002cf4

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