Malicious PDF — malware analysis report

Static analysis result for SHA-256 15710db1c001ac1a…

MALICIOUS

PDF

39.9 KB Created: 2021-05-22 00:29:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ada1d85fdc1621a88616fc4dff60ee4b SHA-1: 6a9b7230f1c40ad3e72c105f7e78d80611fecc09 SHA-256: 15710db1c001ac1a8a0d0705700eb2cbc2057fa6acea23649456f4e3e0bb6dc9
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded artifacts suggest a lure related to 'free Robux' or similar gaming-related scams, aiming to trick users into clicking the malicious link. The ML classifier also flagged the document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/431946152/robuxlove-.net-free-robux-game-hack In PDF document text
    • https://www.elevage-chiot.fr/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003619.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3619 25836 bytes
SHA-256: 346666c0818ce5f1d6d9a09f2a67d777eaf5967ca5bbb5dbd21b8836cff75715
font_01_sfnt_off0000706b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706B 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00007a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A19 18372 bytes
SHA-256: 65db4e182113fd1a8aa6d8046ef53f92d54fa7b6a505b130f920b75136a01eb1

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