Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73406cc9dc699f1…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 08:21:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de9f61edeabed3066c807a3e1e11b054 SHA-1: 93887d86db871d78f565c123400421038affbfad SHA-256: f73406cc9dc699f178cffe1f5b2f37b63b5bb769d354666a55deb13222d694de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically leading to a 'game hack' generator. The presence of a visual download button lure further supports the deceptive nature of the document. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to trick users into visiting a malicious URL, likely for further payload delivery or phishing.

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.online/app/479516143/mcpe-download-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-place-rewards_GM431946152.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_off00005343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5343 30188 bytes
SHA-256: 9285c7fc82fa83d675c1c6422ceb9260b65c8762729accf32e532e100d0f8860
font_01_sfnt_off00009279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9279 2912 bytes
SHA-256: fa76cc2dab30b56d5305de71ce949b6adffd6580af2f26905a33966a3200adbb
font_02_sfnt_off00009c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C75 18240 bytes
SHA-256: a3c3f4f77bf23c89057dc73fb74ec5a2774110dd3bd29e37df914f9a3327f43f

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