Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfe3ec5a7ab89ff…

MALICIOUS

PDF

39.4 KB Created: 2021-05-21 04:39:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 96dbf32025b9fc28fcf8bec851112440 SHA-1: 15bc8b02d3874cf5fa1cbfe9e4d181a3abdd0979 SHA-256: 5dfe3ec5a7ab89ffeb70826085c6e3012478168765b58dbb7f0e7085d24108c7
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 0.8060

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/479516143/how-to-get-minecoins-in-minecraft-for-free-game-hack PDF link annotation
    • https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-roblox-hack_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_off00003610.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3610 25092 bytes
SHA-256: 18503b72932684ee845f65f5822313112e7f584770ee7c9f801e4b646498c3f9
font_01_sfnt_off00006f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off000079d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D7 17872 bytes
SHA-256: d23bbe04ef3196a5fa54f397c57d78b821aa47262b4b410e5e0dbd5db48197bd

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