Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d6e56cce314a45…

MALICIOUS

PDF

71.6 KB Created: 2021-01-08 18:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4b1cfcb468ec40160cef50044eac2844 SHA-1: 7d2202699b765a668439a9391ac3dc8ca27dbc58 SHA-256: 50d6e56cce314a45cfbb17d3569703166e254f615426bc14049f4adb67bc087b
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, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to a 'Belvedere adler sewing machine manual', suggesting a lure. An external URI pointing to 'trafffe.ru' was extracted, which is likely the payload delivery URL. No scripts were extracted, but the PDF structure and external URL are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=belvedere+adler+sewing+machine+manual PDF link annotation
    • https://cdn.sqhk.co/kukojuvata/jehgjfb/head_basketball_unblocked_arcade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470535/normal_5fd1ccf4dfab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f938d301c4ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5f8f4c7a86d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_5fb6f04aacb9e.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/silubebebefuju/jofis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb875270-401c-443e-a4f8-58f52ad40e3b/70204936584.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/dmv_miami_gardens_18326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f63a4c0-0319-48f7-9791-7721d3190127/gikevuboburuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26225021-5e43-4682-801e-c805ed824e91/verizon_fios_early_termination_fee_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f27d8d-e380-4f00-9e84-7349951a661a/papebizufifop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c50c9d-28ce-414b-ab8e-666c143de55c/93672611156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7585f1-1347-48f8-a073-4fdbb1a41353/dragon_chinese_restaurant_los_angeles.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_off0000db3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3F 5552 bytes
SHA-256: 310a0bf0e2e2fc0f8dc9430a1d32d7473a2367b2aad06289d8890905034b1041
font_01_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 10380 bytes
SHA-256: db618a0bc8aadbb7dd8412a6fb453cbef946841d6f17723cceb63b6429fb0006

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