Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d69a4a0436cad56…

MALICIOUS

PDF

46.1 KB Created: 2021-05-16 07:20:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d10adbc4808578481f9df02c1187d13a SHA-1: 9f343743a81de820edff069fb49d65ff7e3875d5 SHA-256: 7d69a4a0436cad56e8a4d3f4dc3d7a7c570c2c898bb7ff12c6fda1a40aa718df
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 0.9432

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/406889139/coin-master-mod-apk-unlimited-spin-download-free-full-version-game-hack PDF link annotation
    • https://tnupacktour.com.tw/image/data/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/2021-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/to-get-free-robux_GM431946152.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_off00004d7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7F 24128 bytes
SHA-256: 3860349a333fd3605841308742826c4549a2ac96b24f6364f36d2a401c139f1b
font_01_sfnt_off000084c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E77 19356 bytes
SHA-256: 92ce47a29f6b22b41a3f27f468cf2ba8cb02212e9ac17cc8e0fda8e64716967c

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