Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dcb6da466bafe8…

MALICIOUS

PDF

44.7 KB Created: 2021-06-02 07:07:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a037f24bc095c95c34fbbd38ccbc929e SHA-1: 3994d05e649fb45ad35029a61b244c937f5df74a SHA-256: 58dcb6da466bafe83de820614cf5c192bd189a282bc364f0a380186e012cf56d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing indicating it's a lure for game hacks or generators. The document body, though partially corrupted, contains references to 'Roblox Hack Robux 2021' and includes the primary malicious URL. This suggests the document's purpose is to trick users into visiting these links, likely to download malware or engage in phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-hack-robux-2021-game-hack PDF link annotation
    • http://ipdrs.org/images/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-rules_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://ipdrs.org/images/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/wurst_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spins-link-2021_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
stream_004_off00004ee4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE4 26276 bytes
SHA-256: 1b590f86942119bc2d856775fdfe9c50c00da6f9d2b3cafc40314a8752480910
font_01_sfnt_off00008ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB8 18724 bytes
SHA-256: 69665c0dccd89a42817f3c51ae96a0d646e845e490b684be08f42fe3c54bf40d

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