Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eada851cee2e30e…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 13:02:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8a26dfc63631e213a0959e3522b1025b SHA-1: 6ec2165642e4529ff997d0705a33de8016943c24 SHA-256: 9eada851cee2e30e5c61c0402c3340a52d7f4fe456587261ba10a491ac3f9922
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/real-working-coin-master-hack-game-hack. The document body and embedded links suggest a lure for game hacks and generators, aiming to entice users to click through to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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/406889139/real-working-coin-master-hack-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-account-with-robux-and-password_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-un-juego-de-roblox-desde-ordenador_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-promo-codes-2021-april_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-vip-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-script-hack-pizza-factory_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/fre-dantdm-hair-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-roblox-tire-dans-les-mur-sur-phantom-forces_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/buy-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-legit-no-survey_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/clothes-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-ss-excutor_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-spins-coin-master_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
font_00_sfnt_off000034a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A0 23120 bytes
SHA-256: ff458dffedced3afc3242b301962a5605a3058c8ba3c1275106bb17e30604dc2
font_01_sfnt_off000068a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 18276 bytes
SHA-256: 6af67ab231adcdd307a15a6a4f5ae357b0ac924b8d59694997f1e905b533e36c

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