Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd775d4ad76bcd9a…

MALICIOUS

PDF

32.9 KB Created: 2021-07-06 00:05:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: fa1f7bf476b6748912e93413191515fc SHA-1: 93fdd9dbe015a11485564a2ce5695e8b715b4441 SHA-256: cd775d4ad76bcd9a22709cd1137de06537f38a62f01d86aa28f93823eaf9ecce
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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 http://netcdn.tw/app/431946152/roblox-hack-client-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-diamond-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-today_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/cheat-engine-for-mac-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-crossed-out_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_off00002acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACC 22236 bytes
SHA-256: 58b375669651b2957700c4e1edc8c2b405b17a738147e29b71c13bfebcacf1cf
font_01_sfnt_off00005c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C07 18880 bytes
SHA-256: aff42d3783a335d76f19585087556b5fc01da002b55490b257e48f03a6311b61

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