Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cd6b1a4a598e9b…

MALICIOUS

PDF

35.6 KB Created: 2021-06-30 09:55:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 20c819c8558629cbf062898392ecc2ed SHA-1: 47fbdbcb22d9833145d83db6009e48c37035fe31 SHA-256: 78cd6b1a4a598e9b85b8518ac66fb0751508bfb23e4869e7346eb8b7e39ec652
160 Risk Score

Malware Insights

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

The PDF contains a lure for game hacks and redirects to known malicious infrastructure. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded URL is a primary indicator of malicious intent, likely leading to a phishing or malware download site.

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/hacking-2-step-verification-for-roblox-game-hack In PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/money-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/robux-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/snake-venom-roblox-hack-whitelist_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-free-skin-2021_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-credit-card-payment-download-free_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/god-mode-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-roblox-accounts-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/hack-for-knights-revenge-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off000030e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E5 23064 bytes
SHA-256: 821305b8f2d23aa69d094dfe982134a2d65d86d8c068d2175385c7f9925daf4e
font_01_sfnt_off000064c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 19480 bytes
SHA-256: f4daa30b5f1fec4ba3b3614804e34d9ff1de1ac92bdee4aafa488ccf4e3fb6a8

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