Malicious PDF — malware analysis report

Static analysis result for SHA-256 3257fd825dd2a09b…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 23:45:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 27d98f4ecfdb367469b174c41685a252 SHA-1: 25a4ca2d386644412c5306c8513fd7dc56fbd147 SHA-256: 3257fd825dd2a09bf4dae90f7a0efb90662270f187793515bf454e8929a26f09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and generators, directing users to a known malicious redirector. The embedded URL `http://netcdn.tw/app/406889139/coin-master-apk-hack-2021-ios-game-hack` is associated with malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/406889139/coin-master-apk-hack-2021-ios-game-hack In PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/farming-simulator-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-items-catalog-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/como-hackear-las-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/get-easy-free-robux_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_off0000307d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307D 22644 bytes
SHA-256: 19b2ab3665972a2a8e3cc128d48bf587dfe7b0c785f3adb35bb10e6229430c8e
font_01_sfnt_off0000632f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 18580 bytes
SHA-256: 16d176bdf1b867fef3a97f0f45415bfc91080120e19e93be694a9c372efb77eb

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