Malicious PDF — malware analysis report

Static analysis result for SHA-256 92920c3d132e96f3…

MALICIOUS

PDF

40.9 KB Created: 2021-05-11 16:35:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e234118a229ba458a1cdccbb7a61fe7b SHA-1: fe3da781df19b2ce0e235f2f2b9c9a1b04b371f4 SHA-256: 92920c3d132e96f3858947772cfb2282155bc5d636ce323f4c8201931eba073a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The primary lure URL, 'https://netcdn.xyz/app/406889139/coin-master-hack-download-apk-game-hack', is flagged as malicious. The document body also contains similar lures, indicating a social engineering attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-download-apk-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/master-game_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/games-to-get-free-robux_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_003_off00004699.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4699 23968 bytes
SHA-256: 9ea130f87ae2c359cf3fed0a6bed993d5e9b9996d1c60edf647b2e27048fa688
font_01_sfnt_off00007cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB3 18472 bytes
SHA-256: a0b4f907e64f54d1e36da46d63ed408052d589db2dcff26c8dd3e6dd691bcc85

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