Malicious PDF — malware analysis report

Static analysis result for SHA-256 91763265ef3b0410…

MALICIOUS

PDF

52.1 KB Created: 2021-06-03 22:44:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 882d7be8bafd228ef36b875e86519ee4 SHA-1: 9f4ab8fc27c5e8f6bfbc8e2d549a0edcf248d1f5 SHA-256: 91763265ef3b041008768d4f526d500e3b7e4b0e3125df9d58e252498f30b856
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a generator or hack for popular games. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier strongly support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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/how-do-we-get-free-robux-game-hack In PDF document text
    • https://perpustakaan.stami.ac.id//repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/hack-a-game_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54D2 25908 bytes
SHA-256: e8fa81cc67e1d33a0a6a1038f8f41df636bb5de899118cf077e35db553c145e0
font_01_sfnt_off000090bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90BC 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off00009a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A64 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA776 18648 bytes
SHA-256: 357fc7c7eb6196ee12ed3080908575177554d85b467bf9142ee0ee232c3cf829

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