Malicious PDF — malware analysis report

Static analysis result for SHA-256 a739d9271211feaa…

MALICIOUS

PDF

65.6 KB Created: 2020-11-25 22:28:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 85414f88cac513a95f22dc385d8a4706 SHA-1: 0a8f15e773ba725db317c71eef2a27e0e436f99d SHA-256: a739d9271211feaa214ab83269e30e72a143da6a268199b689052f5da04d60b2
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to manipulate search engine results or distribute malicious content. The presence of urgency language further supports a phishing or scam attempt. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=laemmle+pasadena+showtimes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383295/normal_5f8bfa7f3bd4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f8889c5f319b.pdfIn PDF document text
    • https://nezemugobif.weebly.com/uploads/1/3/4/5/134519414/bitatiraxagapov_valipijonil.pdfIn PDF document text
    • https://tulorikuxefuwi.weebly.com/uploads/1/3/4/7/134730127/logemo-tewebudu-fulugijarur-potugozilusog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_5fab82afc0581.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/retobifulipo/finding_absolute_extrema_on_closed_interval.pdfIn PDF document text
    • https://s3.amazonaws.com/pedokeza/risazowemajifol.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/fovidixixova.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/94523052611.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/63850422778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79faf10f-22de-4771-aa9f-6d89041e1e79/76649737705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0426c393-30e3-4944-9bfd-7d2dd54ccb46/bowling_games_unblocked_espn.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/employee_turnover_project_report.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_off0000c21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21F 5136 bytes
SHA-256: 4b1e7146bf7faea3ae458175a16971efbfba2d99ca6922a39b02ae9dffc36e8c
font_01_sfnt_off0000d382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD382 11180 bytes
SHA-256: 71c2c3e8e2fb42bb37a1e5d5fcb7aa5404aadda4abfd1c757ed8b5a1efed9720

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