Malicious PDF — malware analysis report

Static analysis result for SHA-256 3617637838c66a84…

MALICIOUS

PDF

35.8 KB Created: 2021-06-29 17:26:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bf75a07704a1cf8b80f2cfe3389d1ca6 SHA-1: 35f86aa7d5bb4586011acc27a8f42c2099a38b77 SHA-256: 3617637838c66a84ad8d46d45f7ca4aed79c19d6fa24a2db380742951e1afe50
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to click on these links, which likely leads to the download and execution of further malicious content or phishing pages.

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/roblox-free-admin-script-pastebin-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-a-person-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/como-hacer-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/cmo-hackear-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-lvl-7-script-executor-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-rebirth-in-ice-cream-simualtor_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/welcome-to-roblox-building-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-generator-hack-2021-xonnek_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/dll-roblox-hack-february-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/como-ser-hacker-en-roblox-xonnek_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/where-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-tool-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-strucid_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-spin-link-today-free_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
stream_002_off000031be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31BE 23040 bytes
SHA-256: d76d24b002c3ba34b9b885cb0ababc340b8e48f3e87b31924dc25d0b273ad864
font_01_sfnt_off00006585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6585 19640 bytes
SHA-256: ffc49dc1ee6c493b41861db648ddd47ab0a4a1565bfb70e0ed81532f682708ac

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