Malicious PDF — malware analysis report

Static analysis result for SHA-256 03272d8e4d76a399…

MALICIOUS

PDF

48.1 KB Created: 2021-06-04 01:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: eb50e2cda30a01f9af29cc88a2bce856 SHA-1: 9b7faa5276ff227aadb395c87e9047d1eb135185 SHA-256: 03272d8e4d76a39959399b5ac2595335f8b8c8c30ab45d74aada974f0b54dc12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as a lure for game hacks. The primary malicious link is https://netcdn.online/app/431946152/can-i-play-roblox-for-free-game-hack, which is designed to lead the user to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/can-i-play-roblox-for-free-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/tiktok-free-like-followers_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pgsharp-pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.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_004_off00005353.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5353 31152 bytes
SHA-256: dfa54e17a2b5447212fd578326bebb2be61a75b546c9b40af47da7f0d344ff2b
font_01_sfnt_off000098f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98F9 18512 bytes
SHA-256: e7c9a4fe6870a820981f50b5265581c9404087a1dcd1112df2882e4616f18a1c

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