Malicious PDF — malware analysis report

Static analysis result for SHA-256 c991485604c82c20…

MALICIOUS

PDF

32.3 KB Created: 2021-07-19 10:57:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f739f66e1c49e721913cabb560a6952d SHA-1: 491fe3051082a879418fdb67de13da736bdc9df9 SHA-256: c991485604c82c20f7603a2996f4a90f766e814e5e54be57bc3f3274a7a8e617
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 0.9900

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 http://netcdn.tw/app/479516143/can-i-get-minecraft-for-free-game-hack PDF link annotation
    • https://techmobil.pl/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://techmobil.pl/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://techmobil.pl/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://techmobil.pl/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://techmobil.pl/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://techmobil.pl/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://techmobil.pl/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://techmobil.pl/images/robux-free-online_GM431946152.pdfIn PDF document text
    • https://techmobil.pl/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://techmobil.pl/images/coin-master-free-spins-2021_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
font_00_sfnt_off00002bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD9 22652 bytes
SHA-256: cd9ff4fa684a9e483fb28e1e01c067bb363e32bcf822ea3c31458a02fe767a7b
font_01_sfnt_off00005dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD5 17712 bytes
SHA-256: e4c5326dba6bbe04ecfe42fb3576534f1bedf9d9a77461a4c126bff948161748

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