Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec4d63df850f57d…

MALICIOUS

PDF

86.4 KB Created: 2021-04-12 23:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b200dd4e761588a5d645b616ef691a3e SHA-1: 0ba908a6f74b15009ddf037fa298c2a790355a13 SHA-256: cec4d63df850f57d0885fad2b9da1471c79a4f1a65e15ab0ed9e35cb3e46f5c1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that redirects to a malicious domain, disguised with a seemingly innocuous topic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI points to a potential download or redirection to a malicious site.

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
  • 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://pelibifir.ru/strik?utm_term=how+to+barre+chords+easier PDF link annotation
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/a8icggd/espn_nba_schedule_australia.pdfIn PDF document text
    • http://gutafagiwoja.iblogger.org/analytic_complex_function.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/ggijmhd/free_tv_shows_streaming_site.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/2ad3d9b8-b766-4e2b-9b69-626c0a4a7872/6843117339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a066bbb5-fe2a-4bd9-89ac-f7ff8346c692/36750155650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d66cd5-7a39-403f-ad8f-7777ba3b1521/68850579601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d47acc-af4f-4982-8895-90a99438fdb5/45864202053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57b23d8-4a26-45b1-b81a-9f8ff35fdbb6/74810806996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5014f66-2e07-493b-acc3-75efc6e47f5b/xelawuvejabavavuvanazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4865c1-8e60-43e2-a8ce-3d76786f86b8/garefonuwusukabuzurezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cf5e25-d039-48ca-a101-99a544db1cfe/64574430300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c656916-f5ec-438c-b6a9-1a37b667af39/aviation_boatswains_mate_equipment_job_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0cf6297-1948-4f06-a4dd-46a529b8fbc8/73265391874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84921e18-f6e0-43bb-be74-d53ff55c60a8/starbucks_coffee_cup_size_names.pdfIn PDF document text
    • http://xuwewodufot.rf.gd/potoromefefuvidugatak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a53fb1a5-b740-4b63-8e5d-be728ae0177a/12869558337.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 5188 bytes
SHA-256: 9f013044d37eb60ac25f0c6cf6027db4f2a79f4bc71786da318e8ff05108e75a
font_01_sfnt_off00011132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11132 11044 bytes
SHA-256: 79c1424f49ca876e461c62bf5273f3bd90580aa51637d95c6db6f0bcfce43d98
font_02_sfnt_off00013736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13736 16120 bytes
SHA-256: 2cfc97915d250804213c9b0e6ad261e0979cd38371fb36ec9174dea58a153a3e

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