Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbe83b52e6a118e…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 10:46:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9312da1a1f91abf8ba5ff0b882b9c0ca SHA-1: f49eb3c623b8ef3902888244f0c6a0d2a98c026a SHA-256: 4fbe83b52e6a118e4e29b939c5761b28b604c9296226b20e9e8fd109c97539de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector domains, which in turn host further malicious PDFs. The document body and heuristics indicate a lure for free game hacks and currency, a common phishing tactic. The primary redirector URL is http://netcdn.tw/app/479516143/is-minecraft-realms-free-game-hack, which likely serves as a gateway to further malicious content.

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/is-minecraft-realms-free-game-hack In PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/how-to-cheat-engine-debug-roblox-without-crash_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/free-robux-pin-codes-paste-bin_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/song-id-for-free-money-cardi-b-roblox_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/free-roblox-crown_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/robux-hack-no-verification-or-download_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/pokemon-go-free-team-medallion_GM1094591345.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/all-free-things-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack-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_off00003417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3417 22472 bytes
SHA-256: d0017934dcbf0e4e8fd4ee8b74fcc7e0262ebe8cccf1175a144d01878e2effa6
font_01_sfnt_off000065c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C1 18192 bytes
SHA-256: 3fdf6c7900c76153a6c8ba7010afe065a028b37808fae2d556e2bfe86359ad32