Malicious PDF — malware analysis report

Static analysis result for SHA-256 1887ed5f734b6b68…

MALICIOUS

PDF

51.4 KB Created: 2021-05-11 00:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e18cf88fe04ad150bee561044a9637e9 SHA-1: 4732cacecb62547fd2f317c903a821a9bb9f0842 SHA-256: 1887ed5f734b6b68009b458620847d68fe6309de67ef80922cd450d69309eb7e
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 0.8646

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-downloading-apps-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D6D 26636 bytes
SHA-256: 236c1129bd9eb614440049e081b9db14b9346b541c92ff89af18a53c86909150
font_01_sfnt_off00008ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC8 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000094ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94AE 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BF 19876 bytes
SHA-256: 8da7f6a753952615a486eb6a0fdfe7794e2ad045808eb185ac8c0a25e8999c49

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