Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f9252a3fc00ce3…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 08:03:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bc3ebec6f2c63a0526b451300e153e0c SHA-1: 0a2c7aae25de9034998e393c57fc9d5fc2562e5f SHA-256: 36f9252a3fc00ce3977e079b0fcc4d5a3a7a8a0edfb715c79c395362c9b92b67
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'cheat codes' for popular games. The primary lure directs users to 'https://netcdn.xyz/app/431946152/roblox-cheat-codes-game-hack', which is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-cheat-codes-game-hack In PDF document text
    • http://sv-nahetal.de/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000454b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x454B 27012 bytes
SHA-256: 5e0a16d55a85cf9c818efd42af5050ae42f2a14b22225ad73509034d4e127458
font_01_sfnt_off000081a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A6 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B57 18456 bytes
SHA-256: 79411d0a2da13a8acff975e82d989f343be59a98b2b19e39ed5663a4026c58d6

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