Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf3e9bc5dea1e4c…

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 21:19:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5bede73b65fb36c1d387e7a413f179cc SHA-1: 427ce57aaf306feb423c23dd0f579d8a81ebd832 SHA-256: 6cf3e9bc5dea1e4c522352b018c0b4215a65e3026e51eef42875ab4ff2375d01
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 0.9864

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.tw/app/431946152/april-1st-stickmasterluke-hack-face-roblox-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-free-ssscripts_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-coin-and-spin-app_GM406889139.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
stream_004_off00004f1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F1A 26124 bytes
SHA-256: d8624e46a26a218f9fe702ca4bc1fd40d9e6e4dc79994c972573944795207c72
font_01_sfnt_off00008b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B68 19252 bytes
SHA-256: caa25adadb179b4be8f2412eef0aaab878a5bbf5ee12f5bf7383a6abdd816aa3

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