Malicious PDF — malware analysis report

Static analysis result for SHA-256 329e6a8752a4e758…

MALICIOUS

PDF

76.2 KB Created: 2020-11-20 04:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0d870c68e30a2165407110bc7024377d SHA-1: bf8aadafc30d2db2fb403f30d137ce7a165e5912 SHA-256: 329e6a8752a4e7587b5d47c53cf0c7916d4b1da70654fbc2635c1b24b515b62e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://trafftec.ru/123?utm_term=jungle+book+characters+girl', which is likely used for phishing or to download a secondary payload. No scripts were extracted, but the presence of the malicious URL and the ML/ClamAV detections strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?utm_term=jungle+book+characters+girl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f89b0e371610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_5fb3b6925cab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_5f94270164a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f876b10be47c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f9fe28370ab7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f89b18fe3694.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6fba4e8e-713e-4b4d-a939-520f9ceb235c/8812800422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c494f9-bbb0-431f-a782-06ea934d027f/42415304722.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/apk_house_flipper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c2f1b8-5186-4923-bbc6-b2c4bf72f736/free_winrar_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/asphalt_8_apk_data_offline_highly_compressed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bffda43-d0f4-4cd9-a835-ea8c0fe98639/drapes_and_curtains.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da06dd6-2ac1-4488-b1da-da6edaedfcec/gikiv.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/soviet_satellite_states_flags.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE014 5136 bytes
SHA-256: 908990b6549637138fe2a78c78dd3a57fae244fd45800c1ddd23b3e9bf5a75ee
font_01_sfnt_off0000f178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF178 10596 bytes
SHA-256: d6bfb49db10b3eecc4fbecc15c8899905ebb15fed1dceef0260f5d42ad3e01e3
font_02_sfnt_off000115b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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