Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6698a18f8c0fcd…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 10:33:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 17b17efad2dd989658c54972ef285338 SHA-1: 1b33b41b73676b8eef8ec7ae611a6954e1300f41 SHA-256: 2a6698a18f8c0fcd477e238baa9c34c6d8531678302187d8cef5b439fc23d0b3
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' content. The document body and embedded URLs strongly suggest a lure for users seeking in-game currency or cheats, which is a common phishing or malware distribution tactic. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing or malware delivery attempt.

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/how-to-get-free-robux-easy-on-phone-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/april-1st-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-items-roblox-20217_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-and-fast_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/unpatched-cheat-engine-roblox-pokemon_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/tycoon-money-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/robux-cheats-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-no-survey-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-noclip-download-hack_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-robloxloob_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-diamonds-in-roblox-royale-high-school_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/exploit-script-executor-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/100-free-spins-coin-master_GM406889139.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_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 21988 bytes
SHA-256: 758da77be3e83a3851228453dfb687663c797853b56fd1aa5a08eb6c7d08578f
font_01_sfnt_off0000609f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609F 19484 bytes
SHA-256: 10e6918622a1e1d776f2ac179078ec20795c6faf86adaf8098abaca9041529c9

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