Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ac064a4af42a46…

MALICIOUS

PDF

43.9 KB Created: 2021-05-13 03:02:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9d21e6e18d5934282970874930193507 SHA-1: 6ae30d26213506937fd599761ee84e12f4e5b32a SHA-256: b1ac064a4af42a4691c91f5983bd6cd1fbd4702a4a34a57da7e3d8900f871a87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free coins/spins". The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-2021-game-hack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, likely leveraging social engineering to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-free-coins-and-spins-2021-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C4C 25928 bytes
SHA-256: c9bb0aae840124278f39b205cc1ae2b797770b6f6f40bf0f7778a292ee1db5d9
font_01_sfnt_off000088c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C0 18460 bytes
SHA-256: 9b9248072d2421e664493d6d5ab14406474bc62db1d786ff94b6c1680f0f8261

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