Malicious PDF — malware analysis report

Static analysis result for SHA-256 31feb3687d247d47…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 09:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3e49fca290aa62a89bf0fbb92000bcb8 SHA-1: fa20783e7615bf4b0133f7cf698c044815b52c9a SHA-256: 31feb3687d247d474efaef0536d02a0c5607d35d6912e81df3d7eeb69c95e0b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, promising free game currency or hacks. The document body and embedded URLs suggest a lure for users seeking in-game advantages. The presence of a malicious redirector indicates an attempt to lead the user to a potentially harmful site, likely for further exploitation or credential harvesting.

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-robux-co-game-hack In PDF document text
    • http://digilibfisip.uwks.ac.id/repository/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/android-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-clothes-temp_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-ranks-up-in-a-roblox-group-hack-easy_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/give-free-account-roblox-13jun-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-aimbot-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-free-robux-hack-i-impress-all-your-friends_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-birthday-cards_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-promo-codes-2021-march_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-khaos_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-jailbreak-cheat-noclip_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/hacks-for-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/eas-robux-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/gear-me-hack-roblox-november-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE0 22324 bytes
SHA-256: db0d4f4c61f091664aa7b591bdd7bfea68ce03c5e047fec117be5fd2ad223b09
font_01_sfnt_off00006158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 18716 bytes
SHA-256: ae86725dd70d168e8b5a24377d7effb3bd88f81667aa3e091abc0f5759eb354b

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