Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b5b0825aedb1e9…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 11:14:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7ac1d5a479af10697043eac93321ee74 SHA-1: 231795da5503eadf22b9b8fcec140b56e197f05d SHA-256: 06b5b0825aedb1e9c7e94ee56984afd2a42171bbe878e5cb1e23e235d1c8307b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/how-to-get-free-chest-in-coin-master-game-hack. This suggests a social engineering attack aimed at tricking users into visiting potentially harmful sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-to-get-free-chest-in-coin-master-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-no-human-verification-or-survey-on-tablet_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-galaxy-wyrm-still-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-hack-asshurt_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-hack-today_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-free-tail_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-collectables_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/hack-de-roblox-robux-infinitas-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/a-free-resturant-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-bloxburg-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-characters_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_002_off0000308b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308B 22468 bytes
SHA-256: 977a96d041ee886fc0f3a9aafe716339d199b234ba72ca770823b8ed0cca12b1
font_01_sfnt_off000062ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BA 18328 bytes
SHA-256: 5256f23430d4563f972a96d35cfee54d20d6f8c7b631d7ed4fd4b6962d092084

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