Malicious PDF — malware analysis report

Static analysis result for SHA-256 636fedcef0d0bf4f…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 22:59:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b9854d194b2affa9beec7690d229b571 SHA-1: 4df45ebe257c686a1b729e0d6f3b5a2b6c9a8465 SHA-256: 636fedcef0d0bf4f87c4fb9874eb79789274361043d4a88025302a6d9e633018
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'game hack' redirector, specifically `https://netcdn.online/app/406889139/2021-coin-master-hack-game-hack`. This lure is designed to trick users into clicking the link, likely leading to a malicious download or further phishing attempt. The document's content and structure strongly suggest a social engineering tactic to exploit user interest in game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/406889139/2021-coin-master-hack-game-hack PDF link annotation
    • http://perpus.unik-kediri.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F37 25040 bytes
SHA-256: d83cef8198b0524ffc9e516b252019a7b68f19100ff699a8b62e4370d60cec7d
font_01_sfnt_off000087ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87EE 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000091a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A1 18116 bytes
SHA-256: 920b3105a00d2e81b44cb3def78d47879883f677e8f7cd602ed441085c36723f
font_03_sfnt_off0000b341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB341 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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