Malicious PDF — malware analysis report

Static analysis result for SHA-256 816001ad032291f5…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 00:08:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bbb94b46dd9ecec634234014424b24ce SHA-1: bee241859e0dfd82948d6b23ceca99f1f82ec9d9 SHA-256: 816001ad032291f56108343de86e229c4df0de1d7d5a81747fcf2e7b1bab8e83
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary redirector URL is http://netcdn.tw/app/406889139/wwwcoin-master-free-spincom-game-hack, which is flagged as malicious. The document body and embedded links suggest a social engineering lure to trick users into visiting potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wwwcoin-master-free-spincom-game-hack In PDF document text
    • http://library.umla.ac.id/repository/hack-roblox-beta-one-piece-legendary_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/auto-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-to-find-youtubers-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-in-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-daily-free-spin-app_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
stream_002_off0000312a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x312A 23224 bytes
SHA-256: 80663d52022ba70994a1b9e2080737c01236496bfd1d47ec7a6a1afe6f7c04be
font_01_sfnt_off0000652e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652E 18796 bytes
SHA-256: eeaced86f0062c7288dc39ff3c7ba0b43a5fbd4fc53d6f4039d01ac87507abaf

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