Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d9fed6256da2cc…

MALICIOUS

PDF

34.2 KB Created: 2021-06-11 01:48:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3d96c13ca45dc137c167c8ab7b239112 SHA-1: 126ef061f633c16f93f99cfb366db0bdaeff8cc5 SHA-256: 25d9fed6256da2ccc638b7c7e4d5cf495550a5922f9025e4ba95aa5f8d6d1a83
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and cheats. These links likely lead to further malicious content or phishing sites. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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 https://netcdn.tw/app/431946152/cheats-for-super-power-training-simulator-roblox-game-hack In PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/demon-roblox_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-client_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-card-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-download-free-download_GM479516143.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005286.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5286 24876 bytes
SHA-256: b26411befaff26b8c903417743f1877045a1d694ed892532818f2f7c57f90fe5

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