Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba37fc6c0584fd86…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 17:24:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c956dbc487a0062e75aec9c3f4c7977e SHA-1: e873d293018cebb7dafb0e9312d36d6c97941b1d SHA-256: ba37fc6c0584fd86f0dab43d6526052ee6c1ec9298263adb8ce6db3973b06978
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure related to free in-game items for popular games like Roblox. It contains embedded links that point to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-candy-decal-roblox-game-hack. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent to redirect the user to potentially harmful content.

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-candy-decal-roblox-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hacker-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-giveaway-discord_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-bloxburg-free-money-codes_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-bodys_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/mpgh-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-hack-youtube_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-hack-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-btools-download_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-without-human-verification-or-survey-or-offers-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-for-samsung-s3_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-roblox-hacks-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/http-appsmob-info-coin-master-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
font_00_sfnt_off00002fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCF 22080 bytes
SHA-256: e689cf77c711c361d019163b42ab6b5380d93cb9b410e338bf9386019fa507a2
font_01_sfnt_off000060cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CD 19172 bytes
SHA-256: ab76e6ddd3a76ce388d3acdc3feab20674a6981e8eeeb8df972fdfb7a23401d0

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