Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97fb46d784a8289…

MALICIOUS

PDF

33.1 KB Created: 2021-07-16 06:35:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7d6c2a0e9a20ef05a17c50b81618501f SHA-1: 080c63fb94d5bd2b700b1fc65b5e2ae1382d1a1d SHA-256: d97fb46d784a8289300b2abaceb791422caead4e191e085de951890df8122016
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to a known malicious redirector infrastructure, disguised as game hack generators. The primary link, http://netcdn.tw/app/406889139/spin-coin-master-hack-game-hack, is designed to lure users into clicking, likely leading to further malicious content or exploit delivery. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/spin-coin-master-hack-game-hack In PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/rainbow-wings-roblox-free_GM431946152.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/what-is-robux-in-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
stream_002_off00002cc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CC7 22984 bytes
SHA-256: fc32d0f28152a0489b87ae8905c5f8aad305c261ea3ec469eca7ba2591ec4de2
font_01_sfnt_off0000608d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608D 17892 bytes
SHA-256: a3a1b04a82279d9b81c305d9015fdfbc4eb608af79be49bd49bec6a16d15ba5c

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