Malicious PDF — malware analysis report

Static analysis result for SHA-256 94923510d1306b01…

MALICIOUS

PDF

35.6 KB Created: 2021-07-07 01:18:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 954388004b1e42f5ed459612b9e67275 SHA-1: 0bb65503b0c3267d28e39bb4f38a15598a2b9744 SHA-256: 94923510d1306b015fd13c51b756a41f67fcb25aa6209483e074aacc5597e1af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free Robux' or game hacks. The primary malicious link identified is http://netcdn.tw/app/431946152/free-robux-websites-2021-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs suggest a social engineering attempt to trick users into visiting these sites, likely leading to further malware downloads or scams. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-websites-2021-game-hack In PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/roblox-cheats-i-found_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-robux-no-human-verification-no-offers_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/easyrobux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/google-moon-active_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/how-to-get-the-roblox-sex-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/roblox-devil_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/robux-hack-100-works_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-robux-deals_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
font_00_sfnt_off0000310f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310F 22824 bytes
SHA-256: c6c797c1d6125f4d06e7f3647b7c7c32efbb9f763307eb69cd998b9739d0cd43
font_01_sfnt_off00006451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 19540 bytes
SHA-256: 7dbc8426627c63cb62956a50d2295124057d24afa4e6276b198320b3de5f5879

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