Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c1959c9aebe082…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 13:37:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f429979f811143eb50a02e5b669efeb5 SHA-1: c688b7eea2c7bb064546fb7ff21db9ba4371ee02 SHA-256: 44c1959c9aebe08275849867ff1f2bb45337f1200de6205a4aec4a978a51b8e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of game hacks and free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which in turn hosts numerous other malicious PDF files, likely serving as a downloader for further stages. The ML classifier strongly indicates maliciousness, and the presence of multiple redirector links confirms a malicious intent.

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-hack-roblox-on-mobile-game-hack In PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/roblox-skins-free-download-fnaf_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/how-hack-in-roblox-with-bad-words_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/telecharger-ded-robux-free_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/youtube-how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/descargar-roblox-para-pc-free_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/roblox-ninja-simulator-2-cheat-engine_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-followers-generator-roblox_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/what-is-robux_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-on-tablet_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-likes-on-tiktok_GM835599320.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_off000032a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A7 22816 bytes
SHA-256: bf64938ab803fbac0ab15c54d0495673c1868144aaa2c79f2045eb14075f2cfb
font_01_sfnt_off0000658a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 19136 bytes
SHA-256: c6cfa40e1d917af866a87a81e144bf0d2408366b6fc953e8a0176cb384fbd87c

Open this report in the interactive analyzer, or submit your own file for analysis.