Malicious PDF — malware analysis report

Static analysis result for SHA-256 919e768ee8edc18e…

MALICIOUS

PDF

36.1 KB Created: 2021-06-19 09:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1ce2e3888955dc8f06f6898666de757d SHA-1: 0e84b5e227fe313f080c71f13c664970dab9a194 SHA-256: 919e768ee8edc18eb7174b35a4a83a937f407281b0c4ece66e2c1e550f7f3981
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" or "free currency" generators. The primary lure URL is http://netcdn.co/app/431946152/how-to-hack-people-accounts-in-roblox-game-hack. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting these malicious sites, likely leading to further malware downloads or exploitation. No scripts were extracted, but the PDF structure itself facilitates the malicious 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/how-to-hack-people-accounts-in-roblox-game-hack In PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/hacks-para-cualquier-juego-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/new-roblox-aimbot-hack-exploit-strucid_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-create-a-roblox-hack_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/elysium-bros-free-robux_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/olzer-free-robux_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/easy-robux-hack_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_off00003322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3322 23132 bytes
SHA-256: b2011aa161aff83cd9941f52a3f02035b4b76413e9290b3527b8a0970c0cf98f
font_01_sfnt_off00006716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 19392 bytes
SHA-256: 7b0a9fc53c87e7c1c1b0dc87a7d61e788e47c1692c1d5edde1725511b1090fb6

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