Malicious PDF — malware analysis report

Static analysis result for SHA-256 36212847def1b3db…

MALICIOUS

PDF

32.9 KB Created: 2021-07-09 06:50:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1f18331593afad4eac70c35e0f9cf2e5 SHA-1: 042a73763e23bf09108379cc775e7c5ab1adad6e SHA-256: 36212847def1b3dbd7b5da7195df59e01b08e49f9d6e50d6e78502625724a2aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a 'free generator / game hack' which redirects to known malicious infrastructure. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to trick users into visiting a malicious site. No scripts were extracted, but the primary attack vector appears to be a malicious link within the document.

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.tw/app/479516143/minecraft-svg-images-free-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-island-royale-hack-script_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-how-to-get-free-hats_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-cheat-engine-63-codes_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-hack-december-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-admin-for-every-game-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-without-human-verification-real_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_off00002ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECC 21608 bytes
SHA-256: dbadacd5c72a1031b4b03f0c683a3e456d4b111246d42d587203d968a5a63371
font_01_sfnt_off00005e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E18 18232 bytes
SHA-256: a09b643334d2e6be4f3f41432578bfd2746235ab347d952591db22e0a7ac2c60

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