Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d91006d38f1e70…

MALICIOUS

PDF

42.8 KB Created: 2021-05-17 13:46:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 36d1cd255a708ae45a2efa4c58715400 SHA-1: e7e27a3e3c6d997f4c0f1e556a096428ea7bb845 SHA-256: 93d91006d38f1e7058cbeffde7987810e066aaf3dd738cff3552549b8ae87872
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links designed to lure users with promises of free game currency (Robux, Coin Master spins) and impersonates PayPal. The primary link, https://netcdn.xyz/app/431946152/how-to-get-free-roebucks-on-roblox-game-hack, is identified as a malicious redirector. The document body and embedded links suggest a phishing or scam campaign aimed at tricking users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-get-free-roebucks-on-roblox-game-hack.
  • 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/how-to-get-free-roebucks-on-roblox-game-hack In PDF document text
    • http://gruporamos.do/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/weird-roblox_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/oginject-co_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/wurst_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D8 25116 bytes
SHA-256: cb154945cdcb9cb92c0fae45476b085b8ec4b6df7d1afe7d5a477ecd8684884d
font_01_sfnt_off000083fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FD 18524 bytes
SHA-256: b7643ab87c6ede69648f322cd81a197be2475f7126f117e622ee98ccb7431d7c

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