Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f22e409782949fd…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 13:01:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b6101fb484bceca463e7c4aae844dff9 SHA-1: 04fe2a0a3a8d7ba9996576d3c451237ee705ad0d SHA-256: 9f22e409782949fdefdffc82cbdf4efece59a36e1d0f300c6a65e88253c9053a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically advertising game hacks and free generators. The document body and embedded links strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. The ML classifier also flagged this PDF with high confidence.

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/coin-master-facebook-free-spins-game-hack In PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/tuto-free-animation-2021-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/best-free-stuff-in-the-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/hack-de-robux-2021-funcionando_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/hack-anime-cross-2-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-natural-disaster-survival-how-to-get-free-balloon_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-como-hackear-una-animacion-para-tenerla-gratis_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-free-login-and-password_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/vashta-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-assassin-parkour-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-daily_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_off000034a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A2 22340 bytes
SHA-256: e2862de82212b871be8b88a846de8acc90fa7b9f5104d53a4fd8204690558a6c
font_01_sfnt_off00006637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6637 18504 bytes
SHA-256: 46e57e29613dd658c869552faba04ca4652fd731f51f8a20629119a06e53848c

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