Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba4930c7dab76c6…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 00:32:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 71550b6aabd2d2322ca216c2976a648b SHA-1: c80b961ffbc60a0ec252dd4a34c28edc9878d898 SHA-256: 8ba4930c7dab76c6ff557166494344b64b5c308ba9c5c6b7b64ee75d94783c7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body and extracted URLs reinforce this lure, aiming to trick users into clicking through to potentially malicious websites. While no scripts were explicitly extracted, the nature of PDF redirects often involves JavaScript execution to facilitate the redirection, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-gift-card-for-free-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/tiktok-free-gallery_GM835599320.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/i-will-hack-and-kill-you-parent-roblox-group_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/does-cheat-engine-excute-scripts-into-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-tix-hack-online_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-hack-wideos_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/descargar-roblox-hack-robux-mediafire_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/hack-mod-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-account-and-password-for-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-hack-2021-no-human-verification-no-download_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/cheat-codes-for-roblox-mad-paint-ball-2_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_off00002fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA2 22816 bytes
SHA-256: 7b72816088714812b20c934accf56822cfeedfe09affd245a8f04888a8a887f5
font_01_sfnt_off000062e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 19048 bytes
SHA-256: 36d692819cd4052ea0b92a15cd52fa98a127e8d11e0430d7a0f06642361bda99

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