Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bb21ed46b55055…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 02:10:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87a45e3668e7a1725a6552a20a36fb44 SHA-1: 537033ba9c9938a18aa125964e27352ce7c1afa3 SHA-256: 38bb21ed46b55055f800c97fb6459be39d08e808659dc0784d5d762f8d584c6c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically targeting users interested in game hacks and generators. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the embedded URLs and the nature of the lure suggest an attempt to redirect users to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/facts-about-the-2021-roblox-hack-attack-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hacks-for-roblox-kat_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-date-and-time-hack_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_off00005155.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5155 25824 bytes
SHA-256: bd601ae2c0f2500d5bd6dea21ed68dfda760c7f2732d86373725f494c4859e5f
font_01_sfnt_off00008d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8E 19156 bytes
SHA-256: e4e927c322c34a68e31d796cc41b45d98a09bf65bc745523e732fdc0ffa777c5

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