Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcad67b743f4f17…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 08:49:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2b23c9921513cc4e53a0c7af57655110 SHA-1: b62203154e6c14d67b84b5b487d5388873355551 SHA-256: 4fcad67b743f4f173a03179c2f393064e124841f37f72da14ab797a35cc16cce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lure users with promises of game hacks or free spins. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spins-coin-master-no-human-verification-game-hack. While no scripts were extracted, the document body and heuristics strongly suggest a phishing or scam attempt using a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/406889139/free-spins-coin-master-no-human-verification-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-on-roblox-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005287.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5287 30356 bytes
SHA-256: 72317a465a7c3ef034befbd6d9f99856ed039e5c44e8f241685510dbf4a3b7bc
font_01_sfnt_off0000923e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x923E 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00009bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDC 18420 bytes
SHA-256: 17135a8ac8f0ddf9b092d45ccb6416efee18f7ec3206ddf644b79c382a5218c8

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