Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc841e891a40579…

MALICIOUS

PDF

43.2 KB Created: 2021-05-17 22:31:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 356c98d9758b3916e13b61d976041624 SHA-1: 730e7850ba5dcc7e85f2563c0540a9c8018d65b6 SHA-256: 3cc841e891a40579dec0729981f3ef1b5c5cfd61df6fda2996df6c660c825634
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and external websites that promise free Robux generators and game hacks, indicating a scam or phishing attempt. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the lure suggest a social engineering tactic to drive users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/real-free-robux-generator-game-hack In PDF document text
    • http://samfora.de/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/claim-robux_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/coins-master_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/free-spins_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_003_off00004776.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4776 27544 bytes
SHA-256: 15cd4326b22bc975663670eaf01f72d5089d48693cfbc5f7f77fa46cad14429d
font_01_sfnt_off000085f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 18420 bytes
SHA-256: 14d46e1fdea56b33fc0f11521403768098913a132f51569f9b7a46a3ad47c201

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