Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dae6f5f913a459…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 13:32:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 949973c76e1056cd04a4a326aa4b7dbf SHA-1: 4197bf22d8663c04fa5f01a9ea3bc8d9d449516c SHA-256: 72dae6f5f913a4597b4c92837e9541b2e7bbfd2a2de208f2aadc9434a18921f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as free game hacks and generators. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-avatar-editor-free-game-hack. The document body and embedded links suggest a social engineering lure to trick users into visiting these malicious sites, likely to download further malware or engage in scams. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/431946152/roblox-avatar-editor-free-game-hack In PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-free-robux-no-inspect-no-pastebin_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-on-ipad-no-verification_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/get-robux-for-free-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-back-my-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-tools_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-kat-hacks_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/will-roblox-be-for-free-when-it-come-to-ps4_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/robux-hacks-2021-on-a-hp-computer_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_off00002ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA7 22536 bytes
SHA-256: 13d7e4b1114b8de8a6b511d252b2562c29a3c8b5436995ca00ef9b0c4a2959e0
font_01_sfnt_off000060c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C0 19164 bytes
SHA-256: 99a2dfea53e00249ebfbe683b8e747107fff044a91516b627ae8fcb1da43db3e

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