Malicious PDF — malware analysis report

Static analysis result for SHA-256 9504c91c67d60354…

MALICIOUS

PDF

33.3 KB Created: 2021-07-02 08:16:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 626b08ed5e720539e184af668480117e SHA-1: 081e9f183b4969d99babca809d187550880b55a0 SHA-256: 9504c91c67d60354a22e28e32bb106662c4f5f3df68448dfd19265e150f86f0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/prison-break-roblox-hack-script-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-redcat_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-no-human-verification-android_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/promocodes-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-hack-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-codes-for-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-assassin-on-ipad_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-get-free-robux-code_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/when-is-john-doe-going-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/install-roblox-jailbreak-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/como-desbloquear-un-cuenta-hackeada-de-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/cool-roblox-hack-scripts_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/infinite-money-roblox-injector-hack-pizza-place_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.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_off00002c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C27 22060 bytes
SHA-256: 8ee3dfa7d4aa565d3ef60e15e98a6e6d8ebc439cd368e6c1c4af393a39e1c6c1
font_01_sfnt_off00005cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 19212 bytes
SHA-256: 7528bed4a253664152216dc6df505e6cd20e44f98129d7d03c345ba50b5204b1

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