Malicious PDF — malware analysis report

Static analysis result for SHA-256 c452daae1df15b00…

MALICIOUS

PDF

33.3 KB Created: 2021-07-10 02:49:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ab9a979fb8c7410d049b7473bed05bb5 SHA-1: 80399fa9a60e2f9c5a83fe991ab459c943cabf92 SHA-256: c452daae1df15b000688ca6c8de6943dc1083340a4168a6120001440bc683a47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDFs, masquerading as generators for popular games and applications. The primary lure appears to be 'Tiktok Free 10 Likes', directing users to a malicious URL that likely serves further malicious content. The presence of numerous similar lures suggests a campaign focused on driving traffic to potentially harmful sites.

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.tw/app/835599320/tiktok-free-10-likes-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/working-coin-master-hack_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
font_00_sfnt_off00002f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F56 21824 bytes
SHA-256: 2dac9603ea2814af9af67fb792433575bce9f832121c10ea872c747a6557b529
font_01_sfnt_off00005f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3A 18248 bytes
SHA-256: 8e78584e3b881086b3eabbaf0e3a7af9a601028a36b47164b26b1c79ba9451d8

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