Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba9e555d14af796…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 11:48:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6923b8580e0f0f94ed8d85cb26d95e13 SHA-1: 09a20a949899c8d2293c7ac5d6e219d9adb7300a SHA-256: 9ba9e555d14af796fb3dbe606890c81206a86eb6c4f311c7fe4eb0bdeb9ee631
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-hack-people-on-roblox-game-hack PDF link annotation
    • http://e-library.dharmawangsa.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/vip-roblox-free_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_off0000313b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313B 21932 bytes
SHA-256: d47c90894e1ec1fa1905cd89cb975934f811f6bef9b756be88f198d052416351
font_01_sfnt_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 19148 bytes
SHA-256: 0496404f34f461102572dff09184c0b6082fd286070dd383a6badfad3968c72e

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