Malicious PDF — malware analysis report

Static analysis result for SHA-256 af91d9b582c1b294…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 08:48:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dda0e6a71c9477ed4a45146a81fa4bae SHA-1: ab52cd9a6bdcd81b3fbad4c0a0569a1677a72f46 SHA-256: af91d9b582c1b29460d3003fc6a8606e98f086ff7a1da8f1f664ec1d41af888f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free spins, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. The embedded URL is likely intended to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/how-to-gain-more-spins-on-coin-master-for-free-game-hack PDF link annotation
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-pokemon-go-accounts-level-35_GM1094591345.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-generator-without-verification_GM431946152.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_004_off000050cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CC 25440 bytes
SHA-256: 6b1c780f1068726f00c5c3c21597e3753276effc0917e89cd82b45b9fdb1d482
font_01_sfnt_off00008a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A32 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000093e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E4 18052 bytes
SHA-256: 2b6154c27660532d98da4aa74bd690eac4d1a1d381f6590d3335daf198931aa6

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