Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbea1742a43f62a…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 19:53:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 63fde721d4b3415ee5dd965a7240e829 SHA-1: 5f7613a3b8a3497910e43c4175e61e7be06c48e5 SHA-256: 7cbea1742a43f62aebd1e1789219df274ef48088d2d4f1fd70e2e5620e95b363
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. These links redirect to known malicious infrastructure, specifically http://netcdn.tw/app/406889139/coin-master-free-coins-link-facebook-game-hack. The document's content and embedded links strongly suggest a phishing or scam attempt, likely leading to further malware download or 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/coin-master-free-coins-link-facebook-game-hack In PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/wwwrobux-cheat-us-unlimited_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/how-to-hack-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/roblox-free-cool-t-shirts_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/como-hackear-coin-master-en-espaol_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_off0000315d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315D 21980 bytes
SHA-256: 2bb58e39b44ddd0192dc64deec650ca4c8da5c19ae321d13f5cf7def3f20db9b
font_01_sfnt_off00006209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 18324 bytes
SHA-256: a658124a96d7796e28a28fa88504f15f0c1b8d02bb82398f146ea7e801da5874

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