Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6bc875eb126994…

MALICIOUS

PDF

41.0 KB Created: 2021-05-12 23:21:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9bc9b87ec38ead5c6da18e733b29a40e SHA-1: 21c393dec52279ad2ef8010374410793c84933f3 SHA-256: 7e6bc875eb1269941e1fdc99c4418207d7c70f2a25d8b6a63050e4387a69d1b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'Coin Master' and 'Roblox' hacks. The heuristic firings indicate these links are part of a known malicious redirector chain. The document body, though partially obfuscated, contains references to these lures and the authoring application, suggesting a deliberate attempt to trick users into visiting potentially harmful sites.

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/406889139/2021-coin-master-hack-game-hack In PDF document text
    • http://www.ideastreet.it/images/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://www.ideastreet.it/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://www.ideastreet.it/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004805.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4805 23908 bytes
SHA-256: 3c6a4bdd291180bf21a24651f5165e77e86f5bb6637d3e0fac8acbf5f6aaa5a4
font_01_sfnt_off00007e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E36 18116 bytes
SHA-256: 920b3105a00d2e81b44cb3def78d47879883f677e8f7cd602ed441085c36723f

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