Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc2247630409ba3…

MALICIOUS

PDF

41.1 KB Created: 2021-04-28 20:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 205e958c5f99f715b0f8dec1b02f2515 SHA-1: d6c0b39a5df3d5044c4fabf9289927bb96bf9f7c SHA-256: 1bc2247630409ba361839508fa39170e59d0711ffa8a8db1ade6c463b7ca3f8f
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 0.9954

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/431946152/roblox-free-robux-tampermonkey-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/roblox-magnet-simulator-hack.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-tshirt-roblox-nike.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-diamonds-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-et-free-robux-on-roblox-and-bc.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-2021-2387202142-robux-infinitos.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-skin-maker.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/trailer-roblox-hack.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/easiest-character-to-make-a-roblox-account-for-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-fortnite-game.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-group-free-clothes.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_off00003f88.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F88 26992 bytes
SHA-256: a06254d8cf84dbc0f58c157455f0ca902ae992ff52fd55cabaf2fd79ca340669
font_01_sfnt_off00007c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C82 19100 bytes
SHA-256: 031370f954ac54c23d244a2fb42ca08b4006613e37b516629f7a65fc5dfcf7f5

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