Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5226290bbc5bdd…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 03:46:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 660d0626c6bd02899734576b506ce39c SHA-1: a13fe7992f54574629b8516bd6a6d5d92cefbb28 SHA-256: 8b5226290bbc5bdd40064b76bc49cf9743953cbfc79da4eaedb8e130f6309f14
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure to trick users into downloading potentially malicious content, masquerading as game hacks or cheats. It embeds multiple redirector links, including one pointing to 'netcdn.xyz', which is flagged as malicious infrastructure. The document also contains instructions that could lead to command execution, such as copying content to a shell. While no scripts were directly extracted, the nature of the embedded links and the lure suggest a workflow aimed at delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/minecraft-free-download-android-apk-game-hack In PDF document text
    • http://www.fabbrotorino.eu/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/mcpe-com_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-spin-ml-link_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
font_00_sfnt_off00004c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C18 25224 bytes
SHA-256: c23b4a258a1e96cd317c8dda18e19cfb7df2acb2406c6d970c7cde64e338dd57
font_01_sfnt_off0000846c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846C 18636 bytes
SHA-256: 653028bcb0f2fb6608854d40a7a9db9360db480d39b3fa53a0b8dd523b133d01

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