Malicious PDF — malware analysis report

Static analysis result for SHA-256 e474fb0949f700cd…

MALICIOUS

PDF

48.0 KB Created: 2021-06-04 04:23:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 48adf0cb926202ccd9f18e2e6c4098f3 SHA-1: 766ec110417381a7e7f46c5aa77a4237567dfc15 SHA-256: e474fb0949f700cda90bee3ff90ee6cc8a6bb95e5bcf7a75e703f958f00c4747
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free Robux and game hacks. The document body, though heavily obfuscated, contains references to these lures and a URL that appears to be the initial landing page. The presence of multiple malicious links and the ML classifier's high confidence score indicate a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/431946152/free-robux-microsoft-game-hack In PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-app_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
stream_004_off00005067.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5067 33124 bytes
SHA-256: 0e5dee2006117e081ed23884cc49c7ff25fcb368ed406812ad1987d241103842
font_01_sfnt_off00009910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9910 18436 bytes
SHA-256: 753f3f2a839cbba740b1165c82973d17105d10f1d8ffbf22e8371d7b58d196dd

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