Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f16ec7c75d9ec3…

MALICIOUS

PDF

39.3 KB Created: 2021-05-20 21:36:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0786199359bc5c765cb40bd67c13b6a8 SHA-1: 5e3a6cf7c98a34d02c6d4db28285684a58f6dea5 SHA-256: b1f16ec7c75d9ec3b36f18415fa8774f74f88692e9bcc58f5ef1b0c84fd23bf7
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 0.8068

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/boost9-com-roblox-hack-game-hack PDF link annotation
    • https://aits.co.id/ckfinder/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/robux-boost_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-haktuts_GM406889139.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_off00003184.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3184 24696 bytes
SHA-256: 24dd3ae9b54b7f4d486e958d39f856cc7cc0a4f1ae0b43921ea1705409ee60ee
font_01_sfnt_off00006a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1C 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000076c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C4 18708 bytes
SHA-256: 116e3350f892353559a46e1e2dd8dd97ba265176f89098854de85373f70222e5

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