Malicious PDF — malware analysis report

Static analysis result for SHA-256 1437288e8034c2fe…

MALICIOUS

PDF

36.9 KB Created: 2021-07-06 19:40:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b264f4d08f231096871c2ca9ec92cdf6 SHA-1: 78f9543fe7004030fd226c3179a73f0c847cba42 SHA-256: 1437288e8034c2feccb9207a1c2775f6e37e881b4c6b3b60e6a75416c8f0103a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body and numerous extracted URLs reinforce this theme, suggesting a phishing or scam attempt to lure users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to download further malicious content or redirect to a phishing page.

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/406889139/coin-master-free-spins-link-quora-game-hack PDF link annotation
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-giveaway-access-code_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-robux-money-cheat_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-free-chaser-codes_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-free-items-2021-october_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-check_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-tik-tok-2021_GM835599320.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/como-solucionar-el-problema-de-shut-down-roblox-al-hackear_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-khaos_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-ban-someone-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/mcpe-master-unlimited-coins-free-download_GM406889139.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
stream_002_off0000389b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x389B 23128 bytes
SHA-256: 0f189fc7f109e6cde8c580d460aabb58c90388a7c5a53d1eab0987d7dc632c4d
font_01_sfnt_off00006cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 18640 bytes
SHA-256: 854813a0d1d296087869f9650f2c8127593c4544be73c34457aa680c0b691141

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