Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2a151e640b5276…

MALICIOUS

PDF

72.0 KB Created: 2021-06-05 17:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1e393fb235063e2eb2618d141b7c6fc2 SHA-1: 90b6037b8f9b252d409fea94d43fb88d00488fd2 SHA-256: 9a2a151e640b5276dc394522b56b3660fb4adb930fe47320cfae0a1f5ca1f240
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URI points to a URL that appears to be a lure for downloading a printer driver, suggesting a phishing or social engineering attack. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/pbw?utm_term=phaser+6280+printer+driver PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387698/normal_60636e2511c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_60331ecfad9dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_6050b5dd8f1b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_602185e2d8029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_60555e6697a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_600f2813b29c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389824/normal_5fdf316694655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493589/normal_602b676504016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_603d2591570a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_6011977dea7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_601f0f61545ab.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/51a559be-49be-4855-8ab1-70f47a41c9a2/amapiano_log_drum_wav_download_datafilehost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3be478-3c25-4b56-90d7-ae3665ed746b/vejofixoped.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c826454-4e09-43a5-a731-0627e74c3ab4/best_egg_diet_for_fast_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c6df23-51c6-474a-b2df-018267165022/zoom_g1xon_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e4818ea-7e8d-408d-8a56-fdb672f2e317/how_to_find_instantaneous_speed_on_a_velocity_time_graph.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_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 5696 bytes
SHA-256: 25d3bd0411cca0e9a0d87ee908c03ed569fe603451be8783cd78a8798aff70cd
font_01_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 10496 bytes
SHA-256: 07f24989787e324dcf31eb1ca72133f56d028554deac7884fa83e106b92f2634

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