Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba7d304af2a4233…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 00:15:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 57ad8deb49489a753fcc0275759139da SHA-1: dac558830210564a190b0c37efecfe487e1aa2e5 SHA-256: eba7d304af2a423355c8e479ee05b239a3aa1b1604f6fb0e21591e759cfeaeeb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising a 'coin master download game hack'. This indicates a social engineering lure designed to trick users into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/coin-master-download-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/cheat-codes-for-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-generator-ohne-hanndy-nummer_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-ss-executor-free-v3rmillion_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacks-de-inspeccionar-de-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/tiktok-free-view-iphone-join_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cerberus-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-kick-gui-2021-work-in-other-game_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-hack-roblox-games_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_off0000311d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x311D 23492 bytes
SHA-256: 2e89b990f92de473f5b77da999834de24cd53abb76b11a5cf227d350a769dafd
font_01_sfnt_off00006653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 18416 bytes
SHA-256: 2dae9065557d4abee0d90e33e108154adc80bbe88806c0a6868c23c69d74ef0f

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