Malicious PDF — malware analysis report

Static analysis result for SHA-256 727c61b81c3b4248…

MALICIOUS

PDF

34.7 KB Created: 2021-07-20 11:16:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 806ab14f09d35fadeb6d93fb66c4cf9e SHA-1: 980ddaad53bbeb29b78bb0b405de1c6089dcf8f5 SHA-256: 727c61b81c3b424885329c0dc519e85000b3f93dea592998fce2e41b02efcc0c
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 0.9970

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/431946152/free-robux-promo-codes-2021-game-hack PDF link annotation
    • http://genialica.com/images/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://genialica.com/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://genialica.com/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://genialica.com/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://genialica.com/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/bloxpink-free-robux_GM431946152.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_off00002e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E03 23472 bytes
SHA-256: b2ecca5bac29c057d0f71b8f82b05dcd765a4122be577fe7976071135a8b6bc3
font_01_sfnt_off00006329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 19192 bytes
SHA-256: 3194ca536d8722d2b06330ad6c688baffc8e871cfb17114e64b346768e742b18

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