Malicious PDF — malware analysis report

Static analysis result for SHA-256 d096a18a35d5de25…

MALICIOUS

PDF

49.5 KB Created: 2020-11-02 01:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f4dcd3bb4a2a73b4fc80be197f25ec6c SHA-1: 37a5a5cb1bfa07f6d850a82581462f2b2b681703 SHA-256: d096a18a35d5de259c58ddc4ab1e929c0d566d6a43bd503be5cabe4155f6e884
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to trick users into downloading software. The ML classifier also strongly indicated maliciousness. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for unwanted software downloads.

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://cctraff.ru/aws?keyword=uno+game+mod+apk+download+unlimited+stuff In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f89fe9e53482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5f8d2891b38fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_5f96b955e69b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426823/normal_5f9bc99f04c22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404976/normal_5f9599dd4837c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f91379eebd78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f894e733d48b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_5f91b447035d0.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://s3.amazonaws.com/nademopor/xufurasivinujefokaf.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/scholarship_essay_format.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A98 5292 bytes
SHA-256: ac97ee02177ad50cf7c752a38aa9f312a8d55dc23bb3bc9b53f919268c96f791
font_01_sfnt_off00006c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9F 11760 bytes
SHA-256: 6870914e6f49212a7a321409b931ce9ce14568b441e9633991e0adcb9f2c98c3
font_02_sfnt_off000093bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93BF 16164 bytes
SHA-256: 45cbdee8d0e9683c34ea7758bf990cbd3650d80547672a96691f419f916de5fb
font_03_sfnt_off0000a8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D6 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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