Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f8c3c0fd80afa8…

MALICIOUS

PDF

42.5 KB Created: 2021-05-20 05:27:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 21f9243491417428da3233742b4e054f SHA-1: d9336796c9d5cf51a253b9df0d3cb74f920d9284 SHA-256: 07f8c3c0fd80afa8958e28e27bb975e38329fdd129253b899ec5d3c99291f782
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirector infrastructure, disguised as "free generator / game hack" lures. These links, such as https://netcdn.xyz/app/431946152/games-to-get-free-robux-game-hack, are designed to lead users to potentially harmful content or further malicious sites. The presence of a visual download button lure and ML classification further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/games-to-get-free-robux-game-hack In PDF document text
    • http://bufbd.org/images/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • http://bufbd.org/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/ww-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-generator-codes_GM431946152.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_off000045cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45CD 26400 bytes
SHA-256: ecb6ed2bb648bd5257b138e2635955f8a3579ee23013fd0fed791f802711adf2
font_01_sfnt_off000082dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DD 18608 bytes
SHA-256: 08e91301afb793f0c8f569168ad93911c90315771ef2b58170e32493949df7cc

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