Malicious PDF — malware analysis report

Static analysis result for SHA-256 42533555e67b1789…

MALICIOUS

PDF

44.5 KB Created: 2021-06-11 11:42:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 610304a363c98cf66594bbc274bd13de SHA-1: 275e48380162d4cd1e0048266b95cfc473d411db SHA-256: 42533555e67b17894bc8ed05f19d656e9fe01d2c755241a27fc679639575f6f5
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/free-robux-pastebin-raw-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/pubg-uc-shop-bd_GM1330123889.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-free-robux-free-robux-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-roblox-assassin-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-in-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/100-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/blogger-coin-master-free-spins_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
stream_004_off00004d9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D9E 26080 bytes
SHA-256: d6e348fd7fac961d5f0597536b0d08af8a5e21e4efc7d501b552761454360383
font_01_sfnt_off000089f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F2 18784 bytes
SHA-256: a0ca356892c981e8473a495250262c5c1fb8345177f639cb75b0667eec67de32

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