Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddc83db8c6d10cb…

MALICIOUS

PDF

35.4 KB Created: 2021-07-08 22:16:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d8f798cc44b552deaaa60bbd912a0655 SHA-1: d2b43c442f21f6ddf8e5994ca669694bbf880cbe SHA-256: 6ddc83db8c6d10cba79cea5939eeb35c9bb2d7b6743b6165ff08e5d3e615fe12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

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/431946152/oprewards-free-robux-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/como-tener-hacks-en-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-free-robux-safe_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/earn-free-robux_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
font_00_sfnt_off00003275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3275 22624 bytes
SHA-256: 648f1ba0a7808936691a7020610c4c0d2f0bc991ed01ebb3b8b6fd00eaef1019
font_01_sfnt_off000064cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 19228 bytes
SHA-256: 28d2551d9716c0c1f642d1de59876c155fe982ad5f1d32fc26186d5dbb125a3e

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