Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38701ec31c808b9…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 04:38:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d051dca2463c4c48a0bd4daaebcff2a9 SHA-1: 18fd2e3f02d7e2feec86355c40cc4c3912df0871 SHA-256: a38701ec31c808b955c9d90a6490330a44eac8efdc3318d19ebe0bda6165a905
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 0.9980

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 http://netcdn.tw/app/431946152/free-robux-app-game-hack PDF link annotation
    • http://razredna-nastava.net/files/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/hacker-t-dog-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-cheats-for-phantom-forces_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/ultimate-trolling-gui-roblox-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-the-golden-tuxedo-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-games_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-hack-ios-no-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-cheat-money-in-jailbreak_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/ninja-assassin-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/what-does-ce-stand-for-the-hack-for-roblox_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECA 22528 bytes
SHA-256: 03f991de0a970263f1d9a36723d2d9ecae18491619750d51baf38ab9749cd5bb
font_01_sfnt_off0000611c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611C 18892 bytes
SHA-256: 98799f5422297995f0985cb1c378b21e0f8722881e70436717831cdef5a17d10

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