Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ea6468e67b095b…

MALICIOUS

PDF

58.4 KB Created: 2020-11-19 08:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9291b243aebd9ee4d9eeacf68495d120 SHA-1: b452ebf18b850edc726b147a68cf3d50e23b42c2 SHA-256: b1ea6468e67b095b13f4072b5e55f5b250553bd4c24749ff03699d93bf367e56
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as Pdf.Phishing.Trojan. The embedded URL, https://trafffi.ru/123?utm_term=samsung+account+apk, suggests a phishing attempt related to a Samsung account APK. While no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate a likely phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://trafffi.ru/123?utm_term=samsung+account+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404725/normal_5f935392789b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f895343b0b79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5f994a9c5cf41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5fa79fd8ae681.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/ff9e35b8-385d-4b4b-a53d-fe3f41743613/7289322444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4026978f-52d4-43ea-b72f-dff358df4f0b/famosas_pinturas_de_frida_kahlo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5844cc6f-b228-4e8f-9666-4c876c4d12aa/97229458470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a271ef-ef4b-4327-a680-34610ddd1288/nets_of_3d_shapes_worksheet_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d85369-e52d-4bcb-8ca3-4b17907fd2af/cell_energy_cycle_gizmo_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99b702a-5c3d-4108-8703-db8c78edc25f/patumajon.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_off0000a8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A4 5292 bytes
SHA-256: f3a820983229240c9b1db4de75d727bddd28e38dbe9634615074816179ef6ed4
font_01_sfnt_off0000ba9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9C 9808 bytes
SHA-256: 8d5729dd6da3554f3c3447d7a643982da0368db42826568feb6f60f46879e733