Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e9c98a22b2247e…

MALICIOUS

PDF

43.4 KB Created: 2021-06-10 17:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 04446558fd3c6867340e8b17c66949ee SHA-1: 916469d3a2114a2fa03863ec7c1f0022d1286e6e SHA-256: 83e9c98a22b2247e0c4cdda05c9655225532150b6a02744aca6c00ec9390d98c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game cheats and generators. The document body, though heavily obfuscated, contains references to 'Roblox Paintball Cheat Codes' and includes URLs that are flagged as malicious redirectors. This suggests a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-paintball-cheat-codes-game-hack In PDF document text
    • http://hardbit.cn/images/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://hardbit.cn/images/games-that-really-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/welcome-to-my-free-modeled-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-prison-life-hack_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
stream_004_off00004e4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4C 24232 bytes
SHA-256: 384bb7861bac44d940368713d2ffe592908cebb2b6a8be0a9b19e626f8aa0d2f
font_01_sfnt_off0000859a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859A 18732 bytes
SHA-256: f4c149a6ea7973d18108f23f1aeddfcd56a290e2b7da20f298731b92ba10fee6

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