Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d43083c44a3905a…

MALICIOUS

PDF

48.6 KB Created: 2021-06-11 02:35:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b4ed0a86fa87f66bbd01612da25ce650 SHA-1: 689061cf33974ab788cc73f53d357cba4622e54d SHA-256: 0d43083c44a3905abca567e0db4c6e6019dd5850e9508d9cec99fd7684cea828
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as 'game hacks' or 'free generators'. The primary lure URL is https://netcdn.tw/app/431946152/how-to-get-free-roblox-faces-2021-game-hack, which is associated with malicious redirector infrastructure. The document's structure and embedded links strongly suggest an attempt to trick users into downloading further malicious content, likely through a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://netcdn.tw/app/431946152/how-to-get-free-roblox-faces-2021-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-admin-panel-twitter_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-selena-quintanilla-shirts_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robux-hack-my-rekoff_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-faces-that-cost-robux-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/growbux-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-a-free-roblox-pants-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-coins-and-spins_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_004_off000052c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C6 30736 bytes
SHA-256: c5576abca6f6d7f4bcd843fabda04034bba449d2e61231a39ba07b75e081cd16
font_01_sfnt_off00009a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A00 18844 bytes
SHA-256: c7f5e85da1b233867cc142c52e2a7a83078bdb5e8c248434bb496f06df62353f

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