Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa691575b496913b…

MALICIOUS

PDF

68.4 KB Created: 2020-12-28 16:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6f12b706cd4a9b8c34579266705b7048 SHA-1: df678819c885b42a3b20eb14fe9b19730c130578 SHA-256: aa691575b496913bcb77c8709aa08bff0774e9a53d3a24816e7cd5d0d343beee
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. It uses an urgency-based lure. The file embeds external URLs that direct users to attacker-controlled resources. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafficel.ru/strik?utm_term=crafty+craft+for+minecraft+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f93fbde61193.pdfIn PDF document text
    • https://cdn.sqhk.co/vateviti/Bifiihe/36832990624.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483604/normal_5fdf73bf2bca4.pdfIn PDF document text
    • https://cdn.sqhk.co/pofevadamem/9Nigehd/68679158807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5fad594b02152.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/hiihhif/peloxoxisobinomadoz.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/a81ee621-dd90-4ff1-a4f5-d9b831097210/77755878231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0140587a-9bb6-41c5-8da4-ed7d0f22beab/graphic_designer_job_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db8b1a3-4344-47a5-82b1-6de60e517ba6/introduction_to_critical_care_nursing_7th_edition_chapters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8647d91-39fc-404e-9896-c10768ad7954/digital_marketing_certificate_courses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9680aaed-8206-4b12-9f3d-15143bf577cf/gegofal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683ed68d-a469-44f2-bdab-1f419c39a73b/51482464481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8389b70e-b5e9-4246-8f90-53870563e3bb/38237634405.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_off0000cc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC54 5164 bytes
SHA-256: 3610c0725d46d3c2ce45b87875e00d23eb399b262d1753c380559ccd1680aa59
font_01_sfnt_off0000ddd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD9 11084 bytes
SHA-256: 3d098389c258b82959dca52a585158907b3a8e7da982b5686c366b0701582e88

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