Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66d2d1a9d92ea72…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 08:08:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d3b30fc0af092639f0b761379797dd34 SHA-1: ab0718c6a980b734815cdd91c10d21befc4b8d31 SHA-256: f66d2d1a9d92ea72b84ffc2efe273277e4f6951dac5bdd00c463f7b083c713b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document body explicitly mentions 'free robux' and 'game hack', indicating a lure for potentially unwanted or malicious content. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting malicious sites, likely to download further malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-do-you-get-free-robux-on-roblox-2021-game-hack In PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-real-real_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/citizen-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/comment-cheat-sur-le-jeux-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-hack-free-robux-and-tix-no-survey_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/ww-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/libro-hacks-para-roblox_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
font_00_sfnt_off00002f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F74 22988 bytes
SHA-256: c8d8f17412660991cc7ce53772ace139541ca275e0fd04a8fdb5d5c6d3f5d631
font_01_sfnt_off00006330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6330 19792 bytes
SHA-256: c279fe3fa07008dd1d3d2513499cf5e2f99bc8ed6bd119a5d4b58ca3f5d2942e

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