Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4fa41f3da240f0…

MALICIOUS

PDF

34.4 KB Created: 2021-07-01 08:16:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 46c45e27afed75d7ac575a70defc9078 SHA-1: b40fa90727641bb18ec098a146fe70e76bb39f8f SHA-256: 5a4fa41f3da240f0ae6b32d16e35215647985f6fbd4ed636e0657f270a04848c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The document body and heuristics indicate a lure designed to trick users into visiting these sites, which likely host further malicious content or phishing pages. 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.co/app/431946152/tryrbx-site-free-robux-game-hack In PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/coinmaster-com_GM406889139.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/master-coins-free_GM406889139.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/robux-free-2021_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_off00002f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F81 22244 bytes
SHA-256: 7a7ac7a0ebf4039cee4c06781d5d30b7ff1a737d548363a162ab95d693ee6823
font_01_sfnt_off00006127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 19120 bytes
SHA-256: 76ad5d030d2284a8499182e32b859f8c980ee899e5335372a2afd1db6723792b

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