Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b663a93bf6a328…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 15:38:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dc1cf1c6b179931c08160bedb19ddd14 SHA-1: 5be572b13bc43edf176080cc7f7ccece60b5a33f SHA-256: 48b663a93bf6a3281d6fe94605bdb93873d4758bfec9afe46087c17d41412085
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to sites offering game hacks and generators. The document body and embedded URLs suggest a lure for free in-game currency or cheats, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/479516143/how-can-i-play-minecraft-for-free-game-hack In PDF document text
    • http://library.unissula.ac.id/fk//repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-bux-free_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_off00004bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD4 26764 bytes
SHA-256: a736f3efcf6f16b13ff82531a6dc045199d8a30335f9b5f5d5036e7e055b8cc5
font_01_sfnt_off000086d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D4 18284 bytes
SHA-256: cc9f65e76ff55973cb5eb44e8d52a3d8c8dc11961be9de6072311badebd77d80

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