Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1511d6d2acb87d…

MALICIOUS

PDF

67.6 KB Created: 2021-01-09 08:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3eafc3a987ba55d7f180a8fb0cf1fca1 SHA-1: 77e8e0679eacdf325ae15a224fbf61ddd48e172a SHA-256: aa1511d6d2acb87d3123f52ed12e2fcc137e9cafcddb47b1dc7c5fa581ffe82e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The document body, though heavily obfuscated, contains text related to 'Petition for certiorari definition', likely a lure to entice users to click the malicious link. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/123?utm_term=petition+for+certiorari+definition+ap+gov In PDF document text
    • https://cdn.sqhk.co/vovewotutal/9hghi0Y/89778293263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_5fc1707a87a3c.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/LG9twgd/como_revisar_mi_saldo_at_t.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/K7Ehigg/idle_farming_empire_moon_mission.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/fyjbuid/police_officer_job_openings_in_ohio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f891f337061f.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/liguwubore/jofuwavezilipazakulukajej.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/climate_change_sample_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e758b6-e0dc-4a6c-bc09-62ad824ff861/persona_q_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/65032911983.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/zagej.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/26145770797.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/sofotewixirabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7fd91c-702e-40a9-ae97-2ffd1da541ec/66056946833.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_off0000cc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6A 5176 bytes
SHA-256: ef747941f2a3ba30b1545d5a892ad5251c03554ad7d1f6b109d742d8913df453
font_01_sfnt_off0000de23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 10408 bytes
SHA-256: f81e7dccee5cf977fd22f942a8b18290264c1b22ffea0bea50e10dc5ffd76e32

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