Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42e8825f0dc14e7…

MALICIOUS

PDF

34.9 KB Created: 2021-07-01 14:37:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b4d421c735162b5f74dde7d0d51dd2be SHA-1: 94abc050c936f871f578237b19368fa78adfef5a SHA-256: b42e8825f0dc14e70b0c8947f99055d2df1621b7eef31d1d4ca3613d4e704826
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, with one identified as a malicious redirector. The document body and heuristics indicate a lure for 'game hacks' or free items, designed to trick users into clicking the malicious link. The primary malicious URL is http://netcdn.co/app/431946152/free-clothes-that-are-good-on-roblox-game-hack, which likely leads to a second-stage payload or phishing site.

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.co/app/431946152/free-clothes-that-are-good-on-roblox-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-2021-survay-pc_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-rade_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-2021-september-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/strucid-battle-royale-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-game-hacking-tricks_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
font_00_sfnt_off00003212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3212 22188 bytes
SHA-256: 8d3c010d29ef17cf25167d2222e64d2c3e798edd084041df77b26906383457ab
font_01_sfnt_off00006352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 19092 bytes
SHA-256: 9aed0e26a5ae3ab068ccd2f5034eadba882b4f6151d8b0deb055fae3d96b5669