Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc932d3792105e31…

MALICIOUS

PDF

44.9 KB Created: 2021-06-02 19:11:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0f22f7f47bd2a915f60ade548153f3cd SHA-1: c40b1aa10a3cde4585eaaf69a0d7b9fb2fd11358 SHA-256: cc932d3792105e31ee835a06129ec8a5e3744dd9cbe87f5e16e115280ee966a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "free generators" or "game hacks" for popular games like Roblox and Coin Master. The document body, though partially corrupted, contains references to these lures and embedded URLs. The primary function appears to be redirecting users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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-character-customizer-free-game-hack In PDF document text
    • http://cosver.eu/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/tiktok-free-login_GM835599320.pdfIn PDF document text
    • http://cosver.eu/images/pubg-uc-unipin_GM1330123889.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coinmaster-twitter_GM406889139.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_off00005148.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5148 25048 bytes
SHA-256: de483ede50ce8f135f8834525ff7217e8cc75df575116eab26dc90f0b72a8747
font_01_sfnt_off00008af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF8 19048 bytes
SHA-256: e08d59d9540fd3d81fb219e668d11c2c13e009fafce17b7a0cd50b651d9f18ca

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