Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc95bb6ead0bb27…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 08:43:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c1b9ba5809a0a12adcd42b6cea8884b4 SHA-1: 98be1545297e00c6fda1b485ed5e22caa53a281e SHA-256: 4dc95bb6ead0bb27c17a8c0b6edd948341a2773b9e7c72975c19862031ca935e
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 0.9980

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/how-to-get-minecraft-for-free-game-hack PDF link annotation
    • https://admin.9credit.vn/data/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-catalog-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-robux-100-working-secret-method_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/800-robux-for-free-gamekit_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_off00003408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3408 22136 bytes
SHA-256: ebeefbae617a01d8d75418a4fecb7a831cbd88af8350172e79fe0a65c701a76a
font_01_sfnt_off000064a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 18164 bytes
SHA-256: 38b14255ac27b6861525ff1bdc726797405021bf36bbc514593b3ffe59b08c64

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