Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea191549d13a629…

MALICIOUS

PDF

36.7 KB Created: 2021-07-04 02:12:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7b225c32fb964f0a9fa6ff6c05e7e24f SHA-1: 6aa9921e48d99b9a2d63c6f241ea84d35a4700df SHA-256: 8ea191549d13a629da09551a8060dfcd880db50cca55427bcb27905768e12980
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generators' and 'game hacks' for popular games. The primary lure directs users to http://netcdn.tw/app/406889139/free-spin-coin-master-apk-game-hack, which is flagged as malicious infrastructure. While no scripts were extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution 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/406889139/free-spin-coin-master-apk-game-hack In PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/noxplayer-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-roblox-hacks-for-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/i-will-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/roblox-health-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/dungeon-quest-roblox-farming-hack_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/hack-para-dragon-ball-super-heroes-roblox_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-in-roblox-any-device_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
font_00_sfnt_off00003712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3712 23648 bytes
SHA-256: 9a242a79d17f0ba03695e206af82982cd72c46b858302d416a4a19d67587e77b
font_01_sfnt_off00006cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBF 18344 bytes
SHA-256: 7d9887165ef16feadfba3a4a15f66fbc2523fe3814b25ea6526ef71165c50439

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