Malicious PDF — malware analysis report

Static analysis result for SHA-256 3044353afa5a8eb2…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 07:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 69874b690e8d7c51e4a75983e73031d8 SHA-1: ffbc89f3ef55930f70326683b57b7e17932eaa37 SHA-256: 3044353afa5a8eb2ab61f5adf8a77eb193791164271957150257ecc633c36f79
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/835599320/tiktok-fans-free-game-hack'. This lure, combined with the presence of a visual download button, suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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/835599320/tiktok-fans-free-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/pokemon-go-free-avatar-items_GM1094591345.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/pubg-uc-kart_GM1330123889.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-daily-spins-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
font_00_sfnt_off00002f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F06 22856 bytes
SHA-256: 1011402797b2f30ac791aa234ac39477f08a5b357a0b57fca2a9759b23e712bc
font_01_sfnt_off00006247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 17972 bytes
SHA-256: 635089bb0a2dda3b90a25983121ccb3da5acc2e65406b6e599c0c265bf0918e0

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