Malicious PDF — malware analysis report

Static analysis result for SHA-256 88dfe59bce8dc288…

MALICIOUS

PDF

44.1 KB Created: 2021-05-13 15:32:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bf58bb5941801f0ddbda4ace02f2b2c3 SHA-1: 17a5242c6265b7c71fe26c5e51571a73fe4a3453 SHA-256: 88dfe59bce8dc288bbb102e4cfd061122a94da09d2c17454745d3ecff2df0c48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into downloading potentially malicious content, disguised as game hacks or generators. The primary redirector URL, https://netcdn.xyz/app/431946152/roblox-free-download-game-hack, is flagged as malicious. The document body, though heavily obfuscated, contains references to game-related terms and URLs, reinforcing the lure. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-free-download-game-hack In PDF document text
    • http://www.centralbarbershop.ru/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/download-minecraft-java-edition-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_off00004ce0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE0 26144 bytes
SHA-256: 6a91747ceb23739be43dbb074f64272a2a8f2153cc5b83e33e77f5223bb5abda
font_01_sfnt_off000088b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B8 18680 bytes
SHA-256: 4713be9169544f6656b4c8be21c2a58d7eafaa04b5602a230b8b1e84fc41e5af

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