Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bbb94923ead78a…

MALICIOUS

PDF

42.8 KB Created: 2020-11-03 05:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a74b53d163ca0e91a340a4e8f9c7df3 SHA-1: d6326686ab6de8919c8b0789c297242da3fe641b SHA-256: 30bbb94923ead78ac87e9ec976e3e14cf24c6046a23f86e81946747e1391afd9
94 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for a free ebook, and the malicious URL is also present within the document body. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?keyword=hunters+of+dune+book+pdf+free
    • https://ruwalabipuges.weebly.com/uploads/1/3/4/4/134465281/2721693.pdf
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/viwosapamokofora.pdf
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/pupekosoxazeputizufa.pdf
    • https://xizejaselaz.weebly.com/uploads/1/3/4/3/134357450/sowagupexakib.pdf
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/cd43e45304b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rizezobabub/64667090147.pdf
    • https://uploads.strikinglycdn.com/files/9e8ebc5c-7a0f-45ad-a6f4-b6584c030296/25439903362.pdf
    • https://cdn.shopify.com/s/files/1/0482/0854/3901/files/sync_notifications_between_android_and_windows_10.pdf
    • https://s3.amazonaws.com/vazisi/boridebumerozubiju.pdf
    • https://s3.amazonaws.com/gurowozenupifi/6793771155.pdf
    • https://cdn.shopify.com/s/files/1/0496/4902/5188/files/bump_top_of_mouth_and_difficulty_swallowing.pdf
    • https://cdn.shopify.com/s/files/1/0503/6326/9280/files/furofebojakebugamavekodil.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_off000068be.bin
0cd2939c973c08e665e7da0c12a57d4797e6e07ddfe47bae7b4bb1b3740240ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BE 4956 bytes
font_01_sfnt_off000079a3.bin
2d30c0358a54eab6bd5e034930e64daf647bbd7e7fa63113b1d0291b727c0218		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A3 10992 bytes

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