Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e56c641fbf80b6…

MALICIOUS

PDF

45.7 KB Created: 2021-05-12 09:20:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0407ad87382a4b29f23dcc990eac9ee4 SHA-1: aaf8771ffa0a38131a2d5b9524eb8640acf9a11a SHA-256: 15e56c641fbf80b6c8e3e8130e4903033f8fdda1ca1826e9ff83cd6b14f76a08
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a game hack lure to entice users into clicking a link. The critical heuristic for 'SE_SECRET_RECOVERY_LURE' indicates the document likely attempts to phish for sensitive information such as private keys or passwords. The embedded URL leads to a domain associated with malicious redirects, suggesting a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.xyz/app/406889139/spin-hack-for-coin-master-game-hack PDF link annotation
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E51 24760 bytes
SHA-256: 357a384e6ff6d9e74fed0930a28d140205d59e5ef18146799711def2a06a6dce
font_01_sfnt_off0000872b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000090dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90DC 18056 bytes
SHA-256: efb6f25b23622ff69f2be3f4d9196c6fd2e96d89fb8c2cc83df2012bf2af43d5

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