Malicious PDF — malware analysis report

Static analysis result for SHA-256 978339b3255e65da…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 08:01:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 16963dd2cabde2dfe6d36846dc8417ef SHA-1: b92d583bb12a4ba755d2d98ae1f049f29311ce9a SHA-256: 978339b3255e65da6b760d4c9e8fc7f2dc22bebb49e62ccb1020df03d2013c14
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body and heuristics confirm the intent is to lure users to click these links, likely leading to further malware downloads or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/injustice-oa-roblox-hack-game-hack In PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/dragon-ball-legendary-powers-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/earn-robux-for-freecom_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-boxing-simulator-2-hack-strength-script_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-hats-for-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/get-robux-for-free-2021_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_off000030c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C0 21708 bytes
SHA-256: c14ef9b85a689cc0aed118caec80557267adfc0f17daf5e6c3fb453d1d923ce3
font_01_sfnt_off00006081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6081 19020 bytes
SHA-256: 7556dae4a504111a5e3478d8dd27e8679b61ec7b5185a300cbdfd1c880676eef

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