Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec43bba1e465215d…

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 05:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 23b8ac81fe1151463edbbaa944a073d1 SHA-1: 37424748e58a9890813c9e8f8e11c32da8e18507 SHA-256: ec43bba1e465215d8d8393b9811558302c47a7533202e09194ab2095c6b35b77
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "free generator / game hack" and displays a fake CAPTCHA or human verification prompt to trick the user into clicking a link. This link, 'https://netcdn.online/app/406889139/ear-free-spins-for-coin-master-game-hack', likely leads to a malicious site or download. The document's structure and content strongly suggest it's designed to exploit user interest in game cheats to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/ear-free-spins-for-coin-master-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/login-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/blogspot-coin-master-free-spins_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005398.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5398 27036 bytes
SHA-256: ddd382ddca304250e3e474a491ca6bdd9907d1e6804e875dd587c14befe59a01
font_01_sfnt_off000091a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A3 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B56 17884 bytes
SHA-256: ecd8870de9922492473d00c4b8bfc3347df30c0c57608714ecf3175ea1d2679c

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