Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e677deecf79485a…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 18:24:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 12d49d844c471c43e026cbf007f3c14c SHA-1: 098061e6581a3eec33cb2a5efa0726b3b01b05fa SHA-256: 5e677deecf79485a9e1962444dec6ad05c9eaab6801074a330c6282906e0f000
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically advertising 'game hacks' and 'free spins'. The embedded URL points to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Coin Master Free Spins Link Download Hack' and the same malicious URL, reinforcing the lure. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into downloading further malicious content.

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.online/app/406889139/coin-master-free-spins-link-download-hack-game-hack In PDF document text
    • https://www.wcauk.org/uploads/files/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/corn-master_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/worst-roblox-avatars_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_off000052f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F4 25220 bytes
SHA-256: 888075e1b164adf7dfe64e50b1d5201f7971808a6092a051efb78287a7a5d932
font_01_sfnt_off00008d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D33 18636 bytes
SHA-256: c1ec4201564ac412151aee87dd7e29d753873e3095a9b57a5834a311c08c0525

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