Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fc0f86ce8153b5…

MALICIOUS

PDF

45.4 KB Created: 2021-06-10 19:19:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 327fd3aae850ccaafab91eeec78474e2 SHA-1: 6afd8149fd9241470da7f08b3c8379766a4d87de SHA-256: d3fc0f86ce8153b517c2a91c5aba3c453921b8c6b8a29aea478feb0e03bf5516
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to malicious infrastructure, masquerading as a 'game hack' or 'free generator' to lure users. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/como-hackear-roblox-accounts-game-hack In PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/cch-ly-robux-free-de-nhat_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-robux-on-roblox-mac_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-clothes-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-hack-any-roblox-acount_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-games_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_004_off00005381.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5381 25944 bytes
SHA-256: e4bfedb6a747b75a85e9f714a85a7a612e18414474f95e4068e002ca0ee8bdde
font_01_sfnt_off00008d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D88 18684 bytes
SHA-256: 13672e8ac440667dc147a5dd886b3686270c2310db4942d7b0a731d6bb763423

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