Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f90dc973adabd7b…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 14:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 88aea40a7e16e74d1883c9103066f1c2 SHA-1: ca882bb0066adea334bbf6322ed37e21c6e52c31 SHA-256: 9f90dc973adabd7b26837fc9654d634643301e1c26f2fae9c29d90a5cda43e84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators". The primary malicious link identified is https://netcdn.online/app/406889139/coin-master-game-hack-version-download-game-hack. The document body and embedded links suggest a social engineering lure to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/coin-master-game-hack-version-download-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.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_off00004fb9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB9 24020 bytes
SHA-256: 2fd5e270b96b4ff12029c1a47efd9e2aef64b16fa62862c0780842658c2a81ba
font_01_sfnt_off0000865d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865D 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9010 18692 bytes
SHA-256: bf7747fad6589835e27396875397848ee10c05064cdddbf89c0c768158d1b55c

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