Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5642852274518c…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 18:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dc891d59eb8b4ee49e0f886d18e3873f SHA-1: ba5004322fa7d455ba56b48d3edc9881d1a4aded SHA-256: 3f5642852274518c9804a8c3baea81bf1403e75232fd5d202cb9de9fd3a0e3fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising game hacks and cheats for popular games like Roblox. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious sites, likely for credential harvesting or malware distribution. No scripts were extracted from this sample, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.co/app/431946152/how-to-cheat-quirk-system-in-boku-no-roblox-game-hack In PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-video-games-for-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-cards-pin_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-take-someones-group-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/can-tiktok-free-view-bot_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/star-code-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-reason-2-die-cheats_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-hack-windows-7_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/best-all-round-roblox-gui-scrpt-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-account-cookies_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-game-play-online_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F95 22216 bytes
SHA-256: a5a92ac2b21b3a29b3bcf4a9bb4fe4e0847c4962d8b03e182026ab13d617f932
font_01_sfnt_off000060c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C6 19948 bytes
SHA-256: 0b65bcbd23c93302da96c6955c210fb4c0fc88606f87e3abaeaffab15168085c

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