Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d407fa11f8bbf3…

MALICIOUS

PDF

40.7 KB Created: 2021-05-13 14:46:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cc4bc40ca5ff367e6932140dc2c23768 SHA-1: 94783e3de4bc049d7fc42215a7034ee9754d090f SHA-256: b5d407fa11f8bbf31683f8922371015fac9967b5fd4a5801d2896eb8330ccb7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body and embedded links promote 'free generator / game hack' schemes, aiming to trick users into clicking the malicious URL. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely leading to a phishing or malware download site.

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/free-coin-master-gifts-game-hack In PDF document text
    • http://dopheide.be/images/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/rewards-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.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_off0000467e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x467E 24432 bytes
SHA-256: fecb8868bf04618d08879f2662f9772ad1cab4c6a7d8b252597d98789c140c35
font_01_sfnt_off00007e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7C 17712 bytes
SHA-256: a02a8482596092bbe2b4efe270951b6f574c255f03fc3b97eeb87af209467e86

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