Malicious PDF — malware analysis report

Static analysis result for SHA-256 278e2d55b72f5be5…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 00:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 30148bb931ae167fc5a57f88dbb185f7 SHA-1: 7456e3331a33c23689f701011038e06c3f6d7d9c SHA-256: 278e2d55b72f5be5714dbf0a2624daf30d0184cc5e902c67d52cf860bd767cfb
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 0.9971

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/406889139/coin-master-cheats-free-game-hack PDF link annotation
    • http://srisaket.nfe.go.th/UserFiles/File/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-daily-spins-link_GM406889139.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_off00004a7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7F 25784 bytes
SHA-256: 0a00c66e75a152acc29aa744d50d3a9394d6dff49a343f695cd48e186b493102
font_01_sfnt_off0000855a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855A 17876 bytes
SHA-256: 3080be39145a7e19e49f31c27d216b7ef11c5a53cf2903de633486ff32396878

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