Malicious PDF — malware analysis report

Static analysis result for SHA-256 affb5a5990263201…

MALICIOUS

PDF

36.3 KB Created: 2021-05-20 22:17:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7b5e9a9ed8dd92cc345daf35aa3d26b1 SHA-1: 33395e9db39aaa05b7ae859aaef7bcebd4f8a72e SHA-256: affb5a599026320103d61eb86e2b3ad773bb4cd5b762d56f09a92dd25158e6e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising a "Roblox Promo Code To Get Free Robux" and "game hack". The document body and heuristics indicate a lure to download or access a generator, which likely leads to malware or further malicious activity. No scripts were extracted, but the embedded URLs and redirector heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-promo-code-to-get-free-robux-game-hack In PDF document text
    • http://empresa-venta.hr/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins-hack-ios_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_002_off000031ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31BA 24864 bytes
SHA-256: 64a3b78f8de2b1a35e98df3e78c56de20eb5983bbbb658dbf3439ba25d9b12ac
font_01_sfnt_off00006b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B47 18780 bytes
SHA-256: 57e6eef1fbc3af66d8c5b48d94799429ebee4b6256a60c8d2844d61f1a05fc0c

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