Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f34497d021bd0b0…

MALICIOUS

PDF

41.1 KB Created: 2021-05-20 13:37:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c48aa5404151241928d4778912667708 SHA-1: 26834547d5a3875816270b2d9a7ff21715cc48a2 SHA-256: 4f34497d021bd0b07c20edce0eaa998dca22502b2484ab46760948c9fa18d4f4
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 0.7508

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-hack-scripts-pastebin-game-hack PDF link annotation
    • https://lib.unitri.ac.id/repository/pubg-5-uc-buy_GM1330123889.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32DF 28500 bytes
SHA-256: de6aebe2d48bbe8a3a96f0139e3be36aa9dd49aaad93f17587b32bc1ff06c256
font_01_sfnt_off00007406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7406 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00007da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA6 18736 bytes
SHA-256: ab18ebd86474bf723d827c8d503b9efdd759369ebb4bbf8c3e0b4762acc2a078

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