Malicious PDF — malware analysis report

Static analysis result for SHA-256 771e6dd5c104838d…

MALICIOUS

PDF

48.6 KB Created: 2021-06-11 03:10:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e9136c84561da35b0f41a5edba26d8f2 SHA-1: 01d03a8adf417ba7c4ec4c9c903866feb441f078 SHA-256: 771e6dd5c104838d81812a76f646a123a3b09b1c4e6c35be09e635f943062e46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks'. The primary lure URL is https://netcdn.tw/app/431946152/free-robux-without-verification-new-game-hack, which is designed to trick users into clicking through to potentially harmful content. The document body, though partially corrupted, contains similar lures and references to game hacks, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-without-verification-new-game-hack In PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-win-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-blox-burg-money-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/best-roblox-scripts-free_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/daily-free-spins_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000535f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x535F 26068 bytes
SHA-256: bd922da4c72b6a410e1af7712fe4e2b818314a8c7d3e755d26cf270947e3aa10
font_01_sfnt_off00008ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED1 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off000098ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98CE 19128 bytes
SHA-256: ff01662aa22ac3f30b673aebfd76ee708ab32291ca03b2cfdb5ef21149dda284

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