Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5cff7e2f168f12…

MALICIOUS

PDF

48.4 KB Created: 2021-06-09 02:53:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e49cb0d8d2459237e95524e46ad4446a SHA-1: c39fb95773c64aac3b9b1bcb7ddc7f14f72739b1 SHA-256: ea5cff7e2f168f123938915611e40a5f089835bdf3b77f28d9b67390d3b2d857
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures related to game hacks and free currency. The embedded URL leads to a known malicious redirector infrastructure, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the document body and heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-hack-accoutns-on-roblox-october-2021-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/6lack-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B7 25896 bytes
SHA-256: a4a3db095d7711a9bcafa70d9532e8ec1ebd30f01659225ee02cf49ad67ab041
font_01_sfnt_off00008b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B76 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000981e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x981E 18992 bytes
SHA-256: 8ac9141cc82647b936d308df8c6d8b1525979ea55bfc4ede26c3cedc025aa3fa

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