Malicious PDF — malware analysis report

Static analysis result for SHA-256 88454e4c03e1376e…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 13:47:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4c692772348f19c5282beb2b4a4d53bf SHA-1: 7362d880036057fbe730fe9a2d61d338f492592a SHA-256: 88454e4c03e1376e06ae7b5ba536b6ef2bb3fe6b5f2755d9d0ca4ccf05ea425e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to external websites, disguised as 'game hacks' and 'free robux', impersonating the Apple brand. The primary link redirects to known malicious infrastructure, suggesting a credential phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a lure for users to click through to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/roblox-its-free-game-hack.
  • 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/431946152/roblox-its-free-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/cmaster-club-coin-master-hack-tool_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_off00004f09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F09 25184 bytes
SHA-256: f9c9533c584c0633952937b6e1f8cef4eb16a12a0ae3589e86b483f5e432f197
font_01_sfnt_off00008858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8858 18052 bytes
SHA-256: 28e620bd92ed75496c639b0b0098322fdf5e49df4814623abb0c2769f623a81c

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