Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5ca7bd75224370…

MALICIOUS

PDF

45.3 KB Created: 2021-05-14 01:05:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 381da15b3cb1537f60b773fd33bc7e13 SHA-1: 10affca05500a9d3511e56a6e245cc26f6e60b14 SHA-256: 8d5ca7bd752243708094b2ae359b60525e3db356aae8ed83d661a5850ff28c88
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 0.9507

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/431946152/get-robux-com-game-hack PDF link annotation
    • https://laconce.com/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://laconce.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://laconce.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://laconce.com/images/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://laconce.com/images/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://laconce.com/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://laconce.com/images/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://laconce.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://laconce.com/images/minecraft-java-free-account_GM479516143.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_003_off00004999.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4999 24764 bytes
SHA-256: 9e716e43c9262f59e090785347fc53e898259806ac0a4f96d6fd0a5c45ee1bb5
font_01_sfnt_off0000820c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820C 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00008eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB4 18216 bytes
SHA-256: e46bf0cf057cdcc1f24e49826db2f5998f04ba9e64eff7e45517ce854ffbd61c

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