Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe1bef40f4fbcef…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 10:28:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 419f3bb9e46425c2df7eb43943b94876 SHA-1: b744158516ec88dd03f9fb2fd8361e727b201414 SHA-256: efe1bef40f4fbcef6c0b7c88d80982a4964478118a3f0ea09ec7a8922e2192f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them by promising game hacks and free currency. The primary link, https://netcdn.online/app/431946152/how-to-hack-roblox-passwords-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest a potential for malicious redirection or download, aligning with a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/how-to-hack-roblox-passwords-game-hack In PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/freerubux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/blogger-coin-master-free-spins_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_off00005023.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5023 24576 bytes
SHA-256: a38bc9ba5efe0ec73fbf3dde4c64d2ea72972e2e2c1f2ddaddf04ea20286e2de
font_01_sfnt_off0000886f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886F 2820 bytes
SHA-256: e5f6ec650849eefe6bc6a1649c2875ce35328d23e4196945bba66cc43e5a49d4
font_02_sfnt_off0000920e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920E 18672 bytes
SHA-256: bdba0893d178c93f7db8dfb8e75fc125deebdc91658f3b2576607bd83519404f

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