Malicious PDF — malware analysis report

Static analysis result for SHA-256 facd830f4a09cd3a…

MALICIOUS

PDF

42.7 KB Created: 2021-05-10 16:31:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c64c064045d91d8b126beecbad2a1aa2 SHA-1: d765881b8403ba17f4110ad9a9d06b750cfed07b SHA-256: facd830f4a09cd3a470be61b3e3a32692f315afe60fb6bb3f63158455a35b304
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free robux'. The document body and embedded URLs strongly suggest a lure to trick users into visiting these sites, likely for further malware delivery or credential harvesting. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/roblox-promo-code-to-get-free-robux-game-hack In PDF document text
    • https://alimi.com.tw/upload/files/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-home_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/robux-page_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/can-you-get-minecraft-for-free_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000494f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494F 25520 bytes
SHA-256: 8c993d74851869d06b50a51613dc0efdf5c213f357c6cfb8d6a789ef091870b6
font_01_sfnt_off00008363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8363 18780 bytes
SHA-256: 57e6eef1fbc3af66d8c5b48d94799429ebee4b6256a60c8d2844d61f1a05fc0c

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