Malicious PDF — malware analysis report

Static analysis result for SHA-256 156509f2d9a23d47…

MALICIOUS

PDF

49.7 KB Created: 2021-05-16 06:16:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d1c2e8cc93d9f2e26711aeff54840c62 SHA-1: eb07d9df40d9bf9ff17cb310138330c1ba0a8698 SHA-256: 156509f2d9a23d47d45434b79c92aa5662c7bce9bd2d99f8009fc665c400f3ab
200 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating a malicious redirector lure, specifically targeting users with promises of game hacks and free currency. The document body and embedded URLs point to infrastructure designed to trick users into clicking through to potentially harmful sites. The ML classifier also flagged this PDF as malicious, supporting the assessment of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/406889139/80-free-spins-coin-master-game-hack In PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/toolbox-mod_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CEC 25668 bytes
SHA-256: 9c4a3336420f8f3fc1d4b1ac5afd58f3bfeba06ec704f825c74ff6bc49c2370a
font_01_sfnt_off000085b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B3 4628 bytes
SHA-256: ff166169fb7bd32bb9528c165b261050626edd26fdc76337d5cc54b5e60d7b15
font_02_sfnt_off000095a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95A0 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8F 18268 bytes
SHA-256: c17bdfe55bcf294db1fa8b97ef7603a16e409092d20395243f391f783e354714

Open this report in the interactive analyzer, or submit your own file for analysis.