Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bfd3ec9e2acfb7…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 07:20:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e24c04025f80836e6121f9ca5e664017 SHA-1: 67ac705b327a7ba6f75357ed7912a101ab8e44af SHA-256: 83bfd3ec9e2acfb72767c9aabedd99bce9431eb46bacf3e7d2a00327ec413f9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free generators'. The heuristic firings indicate that the PDF is designed to lure users into clicking these links, likely leading to further malicious content or exploits. No scripts were extracted, but the embedded URLs and redirection behavior are strong indicators of a phishing or exploit delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/blox-world-free-robux-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/village-coin_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-game-free-download_GM431946152.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
stream_004_off00005254.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5254 25568 bytes
SHA-256: c8928932b3ba365758675ccba6d44685aaca37f7768780055aa7def9e3138b50
font_01_sfnt_off00008b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B39 18460 bytes
SHA-256: aacba205b02649cb17ca6db96e04e864edcc8b3535ee86ede1af231380f35ab7

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