Malicious PDF — malware analysis report

Static analysis result for SHA-256 9554da7c2702927c…

MALICIOUS

PDF

40.9 KB Created: 2021-05-14 07:01:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fcf50ff1e4a78343b4051886176a771d SHA-1: 94897aa25d767618b9a48aef6a9e4c18f30514a3 SHA-256: 9554da7c2702927c7c65cce096f28c39733e6c743d96bef9cb267b840f9cbc17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are identified as malicious redirectors, specifically targeting users interested in game hacks and free currency. The document body, though heavily obfuscated, contains references to 'Coin Master Free Spins' and a URL associated with such lures. The presence of these links and the heuristic firings strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful websites.

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/coin-master-free-spins-iphone-game-hack In PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/wurst-18_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/hack-coin-pro-coin-master_GM406889139.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_off000045cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45CB 24996 bytes
SHA-256: 17aebecd5859b4cae128c25a86c7bbda81d346cb54ef2618cb68724a38a2d724
font_01_sfnt_off00007e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E14 18052 bytes
SHA-256: 7a041e18439e61f25930bd292384183aeabfbba1b3f01f5156e579a6d202eabd

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