Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a42c8ff771b0453…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 18:41:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c5ea27d6a7bff26c4fb80ed5e9137bc7 SHA-1: e457a5af5a5edc2e056c5a1c48c76b3b3f61a31b SHA-256: 9a42c8ff771b0453c4a6232bb6524f223b0c1610b7e2b458e854bb2c13fe8401
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent external URI pointing to a download site, likely intended to trick users into downloading malware. The ML classifier strongly flagged this PDF as malicious, and the document body's content reinforces a lure for game-related cheats or items. No scripts were extracted, but the presence of external links suggests a downloader or dropper functionality.

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.co/app/431946152/free-clothing-roblox-templates-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-redeem-free-codes-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/lifting-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/elemental-battleground-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/feral-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/best-meliodas-roblox-face-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-dll-download_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-a-free-pet-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/team-chqnger-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/pubg-uc-via-login_GM1330123889.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-brickbattle-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-giver-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-hack-robux-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_off00003136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3136 22324 bytes
SHA-256: 94cc794259e2fd28eb3c0e704b3782b28b3619a3d86ab190856c8f31c6d70280
font_01_sfnt_off000062d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 19476 bytes
SHA-256: 0655b418f21976b727817e08adfefb82b8f00a95fb9f53b514541ca5f0c7ae25

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