Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef19f60a1958a85…

MALICIOUS

PDF

35.6 KB Created: 2021-06-27 14:21:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 955beb525608f0592fab71f5fa677b10 SHA-1: 1066b93efad9194927a19267c722bcc3b330830f SHA-256: bef19f60a1958a85c30740866592c0467c3e6479e1cf98df605c428d35465b91
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to "free Robux" and "game hacks", directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a download button lure further support a malicious intent. The primary goal appears to be redirecting users to a site that likely hosts malware or engages in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-get-free-robux-on-roblox-in-2021-game-hack PDF link annotation
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/is-hacking-someone-roblox-account-and-transferring-their-robux-illegal_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/robux-download_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/roblox-hack-pacht-fix_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/roblox-hexus-free-download_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/minecraft-items_GM479516143.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E7 22332 bytes
SHA-256: 0c53abc663109b0b9cd95499e5b2747f7ce2b63f4e9ee15d68a461a3a0df0653
font_01_sfnt_off000064ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AE 19460 bytes
SHA-256: 770cff7605022ce60e1f69314de8ed60773b7a1bee71c99998022d449923658d

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