Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bb8d526552a966…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 06:52:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fa83ad79db71f29a4e4ff0adc4a621b8 SHA-1: e416fb724ce94d5215428aa15f22b65333bf9907 SHA-256: 16bb8d526552a9668fc5088bb2e7761d239e1d986dd5f739d8448cce68a5e3fd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/406889139/hack-card-collection-coin-master-game-hack PDF link annotation
    • http://library.stikessuakainsan.ac.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-pink-free-robux_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_003_off00004bd5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD5 25076 bytes
SHA-256: 04983d61fa3fd117f93aa5d62f683a16c15a9eb11d4b5a6a014fe8e9cb7cd36e
font_01_sfnt_off000084c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C4 17964 bytes
SHA-256: 98f8530e6ad966606d275a875844091aa6ee01ba2a7d6c4e2ba80f09f845ae47

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