Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bb31c096d2e6dc…

MALICIOUS

PDF

50.6 KB Created: 2021-06-03 22:18:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8cb8867c8f2ce4bf0f7764948a5faf0 SHA-1: c2cd6b5ef7e494b9a36189b23ac17a91990e0283 SHA-256: 41bb31c096d2e6dcbc2a8c7fa93d3aa96792b06ee44b399787b49f073500dfdf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a malicious redirector, disguised as a 'free generator' or 'game hack'. The document body and embedded links suggest a lure for users seeking in-game currency or cheats. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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 https://netcdn.online/app/431946152/wahoo-gaming-co-free-robux-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F91 29420 bytes
SHA-256: ce8bb3f2ecd5e1f239321f1cf25723db0dab18cd8d8ad047008865a157f70825
font_01_sfnt_off0000934f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x934F 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA061 19272 bytes
SHA-256: 72186c943ebdf5aadbcd95d877410298c2bcf6c8326a7dd5e0ae66436694e568

Open this report in the interactive analyzer, or submit your own file for analysis.