Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b2ffd166b63583…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 06:30:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b1987a9df912e35b74a21c01cdad545d SHA-1: b807f5afc676c47c9312691ed88eff6aaa37f393 SHA-256: f8b2ffd166b6358338cc7ff88b46fe6db1ebf2fdceaf800801ad5034d6f2fdda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically pointing to a "real roblox game hack" lure. The document body, though heavily obfuscated, contains references to URLs that are likely part of a phishing or scam campaign. The primary heuristic firings indicate malicious redirector links and a lure for game hacks, suggesting the intent is to drive users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/real-roblox-game-hack In PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.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_off000052dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52DC 25912 bytes
SHA-256: 21133c9e66859344237d847b4a2e5e793c6b469c3f4dbf1c49b7eea8181e5a4c
font_01_sfnt_off00008f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3E 18012 bytes
SHA-256: fe6948f8d9aae314f4e598887823c268b1dd75a45433b0d72710ef933c851efb

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