Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3918bbb9638a61…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 11:21:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6f5337b419eccb4ab3a65601fbffe071 SHA-1: 16445cf3d3708d38f1ee0fc73db09528d759fff8 SHA-256: 1b3918bbb9638a61a0e81f4fc83d19f5f93e2821bc1cda8ed65fd19696095f4a
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 0.9980

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 http://netcdn.tw/app/835599320/where-tiktok-free-download-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-a-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-robux-for-free-no-signing-in_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-intro_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-in-roblox-2021-mac_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-download-building_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-something-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-make-a-free-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-wiki-free-items_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-accountsd_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-tix_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hack-counter-blox-roblox-offensive-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-troll-outfits_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
font_00_sfnt_off0000305a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305A 22652 bytes
SHA-256: ff90383462fff3ec33cea709ede47be87e19f9bb70f7a8248da45d550380754b
font_01_sfnt_off00006329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 18916 bytes
SHA-256: cb91b1e24b4af9c36340fe32eae318c3b1d9db0e8674fa7aeb211acfcde3bcd9

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