Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f010ef4c4a4b98b…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 06:13:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f49619f01afc8c479e635ef2e9e1c9c9 SHA-1: a9d31d77a39798926ae1aece03d9cf2f068e3f2b SHA-256: 4f010ef4c4a4b98b090078f5ceb572d8e19104bf76c0391e4729c35666667271
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The presence of a fake CAPTCHA heuristic suggests the document attempts to trick users into performing an action, likely clicking the malicious link to download a payload or visit a compromised site. No scripts were extracted, but the overall pattern indicates a phishing or social engineering attempt to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-script-executor-free-game-hack In PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/pokemon-go-free-leafeon_GM1094591345.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/today-coin-master-spin-free_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_off00005443.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5443 26756 bytes
SHA-256: 678fe7d681fcf7144709c08dc6a999e47af0c94a17640b2d5716ba1089ed0d2d
font_01_sfnt_off00009389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9389 18488 bytes
SHA-256: 6ea6bb0236530492a5726fbff6dc4038301159956e914e548a210a1fa14d9cf2

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