Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d1b604d5b195f1…

MALICIOUS

PDF

34.9 KB Created: 2021-07-02 05:38:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a913a029a9bd6627572aaa982f318e95 SHA-1: a360d561f596aea3324936366fbf68e9d362d20e SHA-256: 53d1b604d5b195f1cf71fd1e6a3faa86ee873ee647262fbef972494c16533005
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains lures for game hacks and free currency, directing users to a malicious redirector. This redirector, in turn, hosts other malicious PDFs, indicating a multi-stage lure campaign. The primary goal appears to be tricking users into downloading further malicious content through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/how-to-hack-any-roblox-account-agust-2021-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/free-tiktok-followers-com_GM835599320.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-accessoires-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/the-streets-roblox-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/wurst-18_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-hacked-client-download_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_off00002f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F39 22460 bytes
SHA-256: 91f931e960ac239f2ab785adb0cbca02697414145541d9ef2524f29f4beba1ce
font_01_sfnt_off0000616b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 19644 bytes
SHA-256: f1b80ab180f71adeead7ac3f68cfea3baaa54cfd5cdd2d9b8eb3c0741e187cb9

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