Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4ae2830947d936…

MALICIOUS

PDF

66.5 KB Created: 2020-12-18 13:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4d20e6d3ae99a784bc544b7121dd5b46 SHA-1: f42f5dcd0a582ce38638560d3319c059420c845e SHA-256: ec4ae2830947d936e7ec33c3d868ce8c1b3e6e8de0f7db5120d0ff5531c63bf2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, contains text related to 'bar movie hd', suggesting a lure to entice users to click the malicious link.

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
  • 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/aws?utm_term=bar+movie+hd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411932/normal_5f9e8b4897cb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5fd65435c6507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5fda6b3d83a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5f8eef84a1675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473388/normal_5fb6af195ccd9.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/e5716f6a-824f-4092-b3c4-5097626af948/gilivik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b40b8a1-853d-45e7-b5aa-00938e83f438/gusefiwuzavuvabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb9abcf-922e-4dee-a0cb-b2f9d84cc479/nideledobulidagug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe9cac7-bee7-4037-a798-cb6fdf0e144a/50306685926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009153e8-71de-4938-9f32-f6057dca8784/adding_fractions_with_unlike_denomin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7150f0-75a7-4004-b3ec-baa1b502a9c9/es_file_explorer_apk_no_ads.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc781bf5c272238a81a8919/t/5fcfe6faeba55d4eed5fbca6/1607460603357/easy_pencil_drawings_step_by_step.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_off0000c8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FD 4964 bytes
SHA-256: fa85c385b343802416f25667cc8b4565f0b2d32e08f2d950ccd1b568dc009a59
font_01_sfnt_off0000d9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BB 10572 bytes
SHA-256: 178138d45ed6ecd5e9327e9f64fd77ec1fa4609045727df67ba62e20949c0f41