Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe29869b28c6fa1f…

MALICIOUS

PDF

42.8 KB Created: 2021-05-19 14:36:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3690d8599dae41800c1679421bcf37b6 SHA-1: 2c6eb7a9d9450c12be2b76bee760c54d14773115 SHA-256: fe29869b28c6fa1f154ed415f681d0d15d3c58f7893f3ce85e8f2e32a4f4c704
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links to known malicious redirector infrastructure, specifically targeting users with lures related to free game currency and hacks. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to these lures and the malicious URL, suggesting an attempt to trick the user into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/huskybus.com-free-robux-game-hack In PDF document text
    • http://bpbfloydinc.org/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/robux-win_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46B9 26444 bytes
SHA-256: 0b09d3b46ae9542b5ae1366d033f17a5d49d692a34ceee8e9862b611ff333f64
font_01_sfnt_off000083b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B1 18688 bytes
SHA-256: 6add98f93d6464e4673e157e466f8eac90a499b9ef5784f234ada041ea0169f0

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