Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb9085a07b2ad6f…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 07:42:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 73c2daae8c9d0ce64737954d239e63d3 SHA-1: d9a17f2d2839e68fbecd8aa01e8acbfc74f5d691 SHA-256: eeb9085a07b2ad6f6afcd5dae598b2705e4919e73ecdbe070307cffc2e282dba
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free Robux and game hacks. The document body, though partially corrupted, contains a URL pointing to a 'game hack' generator, reinforcing the lure. The presence of these elements strongly suggests a phishing or scam attempt designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.tw/app/431946152/addrbx-earn-free-robux-by-doing-tasks-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-guide-to-free-spins-and-rewards_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_off00005421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5421 25152 bytes
SHA-256: 1329c2a74e692a7cbab7111d867728c08c4c1823e49eb7f60a5c484170bdf2c9
font_01_sfnt_off00008e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 19344 bytes
SHA-256: 86bc9f368df93e5ecdde88425ca08ec11671c7201f4112715fa64b94a111659b

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