Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c7ef7d172b2181…

MALICIOUS

PDF

40.8 KB Created: 2021-04-27 15:26:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2388d4f39f61d532e873dd4627338dfd SHA-1: b2df710d31c660215e638f418415a6b0dbcf54dc SHA-256: 27c7ef7d172b2181b261e33998f79708556ebe1c8d225dd999699ffcbc96dc5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks or generators. The primary link, https://netcdn.xyz/app/431946152/anarchy-hack-roblox-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to exploit user interest in game cheats to redirect them to potentially harmful sites. The document body, though partially corrupted, contains references to 'Anarchy Hack Roblox' and the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/anarchy-hack-roblox-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/raindrop-hack-roblox-download.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-mod-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/getbucks-me-roblox-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-com-passwords-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/brickmaster2021-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/can-you-buy-roblox-hacks.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-change-roblox-name-free-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/cheat-roblox-pc-phantom-forces.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-promo-codes-roblox-group.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/paginas-para-hackear-en-roblox.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_off00003f58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F58 27220 bytes
SHA-256: 945053715250c5b7bb48f3151cb99f249be61e44324d86c71d3f4932e10726a4
font_01_sfnt_off00007cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC4 18528 bytes
SHA-256: 429c264d6a6e384cbf9fbdc5b81e3ce5b43087f28edb54107ff751f756b36731

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