Malicious PDF — malware analysis report

Static analysis result for SHA-256 729d688fae8ab6c3…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 08:08:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 09098bd6a4528414e0f5642fd52e6195 SHA-1: 07d04774d3e6d79d6eb2fec5a2de0d7c86a33ec6 SHA-256: 729d688fae8ab6c35b33c81949b0f10b6bc8f27f983823adc10fbae15c26cdd2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, masquerading as game hack generators. The document body explicitly mentions 'how-to-get-minecoins-in-minecraft-for-free-game-hack' and includes a primary redirect URL, indicating a lure for users seeking in-game advantages. The ML classifier and specific PDF heuristics strongly support a malicious classification.

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/479516143/how-to-get-minecoins-in-minecraft-for-free-game-hack In PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-hack-week-2021_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-roblox-for-playstation-4_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/cache-http-robuxiancom-tutorials-freerobuxcodegenerator_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/rbx-robux_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-cool-girl-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/ash-greninja-shuriken-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-hack-on-roblox-mad-games_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-insert-tool-hack_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/is-roblox-bloxburg-free_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000312f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312F 22208 bytes
SHA-256: 24379391a8da36426bfca7d5ea55269c4754c472ef9aaa13caeae8218317bcaa
font_01_sfnt_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 18164 bytes
SHA-256: 30674b0950fe3b175661e2115258e071aa6d1a839cd3a01eb7501d4a58649502

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