Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca0dbeb79c87aee…

MALICIOUS

PDF

47.9 KB Created: 2021-06-09 09:46:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7c73ad162fdf9eb1d65b70eba9eb330f SHA-1: 91be98f2d745e221478a63bcce7c838daf9196d9 SHA-256: fca0dbeb79c87aeec2d286326a26bd87d237b8e6489e480b5dfdbf05a510bef7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, presenting itself as a 'free generator' or 'game hack' to entice users to click embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious redirection workflow designed to exploit user interest in free in-game items or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-robux-secret-skin-tone-combination-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/como-hacer-trucos-para-hackear-a-la-gente-en-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/10-easy-ways-to-get-free-robux_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000516c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516C 25492 bytes
SHA-256: f028926598235d1670b637fdf20c061cc2faeccff6f16a304b0ee76ca628a57c
font_01_sfnt_off00008ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE6 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9696 18896 bytes
SHA-256: d3dd504ec41ba49765d40479f4742b5c33fbe666d02d6ad502e46db033cebfb9

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