Malicious PDF — malware analysis report

Static analysis result for SHA-256 f330316c0b92f948…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 16:14:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 99791b224bcdf71fc78ee1570f9e2e55 SHA-1: fd883ee558250c8b07d432ea160f8e2f97c73340 SHA-256: f330316c0b92f948579367fa9c892a103bea768b31fd67866942f2eb6d20c092
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free in-game currency, with an embedded URI pointing to a suspicious domain. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution.

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/free-spin-link-coin-master-app-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-claim-now_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/tiktok-free-anime-websites_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/script-roblox-pet-simulator-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-promo-codes-2021-no-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-unlimited-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
stream_002_off000031a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A8 23364 bytes
SHA-256: 1d4609f3cdd2b118e0759d4a5d610a22e5967bb4db0f51d19646776ca0d83163
font_01_sfnt_off00006669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6669 18344 bytes
SHA-256: 5ba5712e1f8a72cd898b4b1d834b987228c2e482256828e1dac09ae5eef18b54

Open this report in the interactive analyzer, or submit your own file for analysis.