Malicious PDF — malware analysis report

Static analysis result for SHA-256 9602088de505e1a8…

MALICIOUS

PDF

33.3 KB Created: 2021-06-26 11:33:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e6767a9b56de82d26f2cb69e25f35ef8 SHA-1: 0c13a1585f1b70e5206a75d1e55c79714eac1221 SHA-256: 9602088de505e1a81af134d6ba8d57bbf0f14918ed891a6f244a9442a01f02a9
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and extracted URLs suggest a lure related to free game items (Robux, Coin Master spins), aiming to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/roblox.com-avatar-free-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-hack-no-verification-on-ipad_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/best-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/pubg-uc-10_GM1330123889.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/lollipop-simulator-hack-sckitp-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-hack-app_GM431946152.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_off00002e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E42 21296 bytes
SHA-256: 58eb7348a11d7cb9a1a1313b93f39f07476248078c118a31a944bd901fbc728b
font_01_sfnt_off00005cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB9 19196 bytes
SHA-256: 02d829f3c5594f966e9f9b644c345ffe6f6fb236fd5a7a4df0d77273cc6a0431

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