Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe52a2bc61312d9a…

MALICIOUS

PDF

35.7 KB Created: 2021-07-08 11:27:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 28d4215210c780cbae5656b3dcbce904 SHA-1: d7ea97573ae532e3c2ed1b63fde2cdbc0b950fe2 SHA-256: fe52a2bc61312d9abff3dce52716b176d6c043e50bf160399d9a897e734326e3
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/431946152/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • https://tnupacktour.com.tw/image/data/files/roblox-hack-injector-dll_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-source_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/heist-2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-no-wait-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-a-free-unicorn-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/counter-blox-roblox-offensive-knife-hack_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-roblox-games-that-you-dont-have-to-sign-in_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/minecraft-free-online-games_GM479516143.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_off00003291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3291 22160 bytes
SHA-256: 3bbf988f862a64d50e3c218412172af3c71a98640f3be3eff49341f9d5dd3b09
font_01_sfnt_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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