Malicious PDF — malware analysis report

Static analysis result for SHA-256 425dad3ab6d3052f…

MALICIOUS

PDF

33.0 KB Created: 2021-07-21 23:25:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1cf128d463e7b8a1ea86dfb09dfe25e5 SHA-1: 91a02ff9d52c33c9b6192e3c8659886d24ec8860 SHA-256: 425dad3ab6d3052f9797bd72bdabd18649ad9dae3489e09d4fa2f39ca47a1571
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/free-minecraft-resource-packs-game-hack PDF link annotation
    • https://yucaboats.com/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://yucaboats.com/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://yucaboats.com/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://yucaboats.com/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://yucaboats.com/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://yucaboats.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://yucaboats.com/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://yucaboats.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://yucaboats.com/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://yucaboats.com/images/free-robux-please_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_off00002d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D01 22620 bytes
SHA-256: b0099fe33149b0f84220bc8cd4d22596814d4b987af2c8499085995e9b74720a
font_01_sfnt_off00005f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 18172 bytes
SHA-256: ba55ace67aaa42a75d72a76423215630d067bde5e330a1763dcb3073f08e6856

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