Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96370c88960ff25…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 21:54:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6462f58cb8382b24c1e8f58b29bee689 SHA-1: e084da9be664d24a025ddbe91f12d1ac17fee8cb SHA-256: d96370c88960ff25f0f74040ebc5cc6726810b8ef3daa1970e52d2dea1d7615d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. The primary link, http://netcdn.tw/app/431946152/buxblast-com-robux-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially malicious sites.

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/buxblast-com-robux-game-hack In PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/best-roblox-games-with-free-beatbox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/spare-api-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/roblox-hack-site-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-robux-2021-april_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/25-free-spins-coin-master_GM406889139.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_off0000314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314F 21912 bytes
SHA-256: 61452e6c5b356a1adc354c5696d533050437919a1da5a209f2994da7b124e360
font_01_sfnt_off000061b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B4 18992 bytes
SHA-256: 197673ba6fcebc329b4784198f1377e9ca1d19b741085a403e584bd9650ddd4c

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