Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad58ff991657fcc4…

MALICIOUS

PDF

46.1 KB Created: 2021-06-04 03:24:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 41da706a8d72cf81390b08ebec7c90ea SHA-1: 691a4c9c14c56ed71b6d18d81080c47661f9b4cc SHA-256: ad58ff991657fcc453ed967a3b31ba3762e96ac1b2cdb1a1b87996d2825765f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure for free game currency (Robux) to trick users into visiting these sites. The primary link, 'https://netcdn.online/app/431946152/how-to-hack-on-roblox-and-get-robux-game-hack', is associated with a game hack generator, indicating a likely phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.online/app/431946152/how-to-hack-on-roblox-and-get-robux-game-hack In PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • https://www.bandicam.comIn 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_004_off00005383.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5383 25748 bytes
SHA-256: 5403a3466a647c39e6a5cd002040815ee0ec605cf2d92c1277994833e83fa288
font_01_sfnt_off00008fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCE 18764 bytes
SHA-256: cea93880a46c99ae5c1214a08a21d84e1106aa0c5aacb4d4d8736db717a7e9df

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