Malicious PDF — malware analysis report

Static analysis result for SHA-256 655cab38178e674a…

MALICIOUS

PDF

58.8 KB Created: 2021-06-04 04:32:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 720dabfaf41c1fa4658cb6be5bf633c4 SHA-1: d0286d723b68c051299e2ecf6642a2c296a81f18 SHA-256: 655cab38178e674a444a607d9aa73e0e58784f535e2c84f5441c93a55f5c0e7c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9504

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/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml-game-hack PDF link annotation
    • http://perpus.stikesphi.ac.id/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/pubg-uc-app_GM1330123889.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005372.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5372 26760 bytes
SHA-256: e697630a24ed5008fc8a84d093a12b9b33537b98f3516b34219360599b2c04c7
font_01_sfnt_off0000929c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929C 3192 bytes
SHA-256: a55eb3b5bfccee8615d925fabc2db3b38481ccf4f0a06f3681dc7a258cbabd67
font_02_sfnt_off00009dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCD 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000b0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F3 19576 bytes
SHA-256: 1f6fe90e29780f620c300caf81dd3dc0229f82e574bfd1c4d8b0942b4ac7233e
font_04_sfnt_off0000d6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BD 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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