Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e774c9f166af3cc…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 19:40:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 93036540fc8c30fe1c67d1f7df0655c5 SHA-1: c36da6d3fbe0407db1ca8b8f438986528618d4a3 SHA-256: 8e774c9f166af3cc07ffc3b699c4e256a6dfc6036290f3a0ebdf63697a062596
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency or hacks to trick users into clicking a link. The embedded URL, http://netcdn.tw/app/431946152/free-robux-no-verification-or-survey-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest it is part of a phishing or scam campaign, likely intended to lead users to further malicious sites or downloads.

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/431946152/free-robux-no-verification-or-survey-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/dragon-ball-online-revelations-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/como-tener-dinero-infinito-en-jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-elemental-battle-grounds-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/assassin-2-roblox-hack-khnif_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/play-roblox-on-google-for-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-build-a-boat-for-treasure-hacks_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/tiktok-free-names_GM835599320.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/inspect-elements-robux-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-minecraft-skins-girl_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_off00003172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3172 22816 bytes
SHA-256: a12c2bddfaf9f5dbc896da573fe4ac9504c17e2bb2f1145df9ac96053b19cc83
font_01_sfnt_off00006496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6496 19368 bytes
SHA-256: 551afc8435a3263a9a14f68c6fac56cdd03dabd4713ff120a4b3cc718d9f39ef

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