Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6ab5db877fc42f…

MALICIOUS

PDF

46.9 KB Created: 2021-06-04 00:18:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4ce59abb280540f1cb69e4d1306928c6 SHA-1: 18d9eb44cf9f176d1c5a10b759812be546d13d31 SHA-256: fb6ab5db877fc42f5ff00ea55c6e78b0eb43bcddcc4bc47f12d943916418310b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that align with this lure. The primary malicious URL identified is https://netcdn.online/app/479516143/mc-update-game-hack, which is likely intended to lead to a second-stage download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/mc-update-game-hack In PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/pokemon-go-free-quick-catch_GM1094591345.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://freegiftcodes.euIn 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
stream_004_off000053e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E2 24824 bytes
SHA-256: c2f58fbf7e83ce24715edcb05577001243f151b3a1d754b647608611db130d1e
font_01_sfnt_off00008b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7D 2840 bytes
SHA-256: 20e88e247102f07c6a70b4d36c7da419714b68793fc4cb00c42292950da9c9bb
font_02_sfnt_off00009539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9539 17984 bytes
SHA-256: d912b59cf3700509e031a0d1a9fafd9fa7aacd8625d0d81f580c93ae41e1c27e

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