Malicious PDF — malware analysis report

Static analysis result for SHA-256 332940ac8aa9f958…

MALICIOUS

PDF

150.6 KB Created: 2020-11-16 13:16:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec7fd6704729f621697fd297cf50cd81 SHA-1: 7c7d3e31d5939304c910400ce6a636869ab2dbe7 SHA-256: 332940ac8aa9f9582cf46de590428bbb6141f6f9b0a6457d61bedc54f9d57545
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'traffking.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content.

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://traffking.ru/123?utm_term=shakespeare+macbeth+pdf
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5f97409756238.pdf
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5faf8f71352f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a02d3936-c6a7-4430-a4b5-a4672b63561e/49950675597.pdf
    • https://s3.amazonaws.com/memul/naval_architecture_books.pdf
    • https://uploads.strikinglycdn.com/files/0bd0b3a5-6905-4474-acff-c748091f2ceb/tiduv.pdf
    • https://uploads.strikinglycdn.com/files/34dd1460-b225-40e3-8e52-96373583adb9/bare_reflections_book.pdf
    • https://uploads.strikinglycdn.com/files/1d44657d-5a9c-47d1-92f9-48ffc96696c4/72540584245.pdf
    • https://s3.amazonaws.com/naxizugenabi/61857551181.pdf
    • https://s3.amazonaws.com/xaliwalufoguni/17039254495.pdf
    • https://s3.amazonaws.com/bulikowexunepov/79738192521.pdf
    • https://uploads.strikinglycdn.com/files/2ed684ca-6ef2-4edf-b8a7-695e3121636b/dr_seuss_sleep_book_free.pdf
    • https://uploads.strikinglycdn.com/files/b8a76930-5be7-4050-8a54-29f40a0c76c7/veronica_schneider_lee_low_books.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000214ef.bin
b29e0b7a0cc9dd68537a0a9274d63b9d59dca6bc1dabb72abe5815c7d4489c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x214EF 5668 bytes
font_01_sfnt_off00022807.bin
f391bf545c37801d0448e6879809e0676acf810bd2905e50e84ee2b40007935e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22807 11068 bytes

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