Malicious PDF — malware analysis report

Static analysis result for SHA-256 911267dbfdf567ce…

MALICIOUS

PDF

47.1 KB Created: 2021-05-16 08:46:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d1cd89d3c0f785118463769c85a1a624 SHA-1: 2bd8b541887c8fc318db962b5cdfe5d9249a0088 SHA-256: 911267dbfdf567ce5de745954951370cd1b236f9ba43b100d89c0e77847dbe55
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users with promises of 'free Robux' and game hacks. These links redirect to malicious infrastructure, specifically impersonating brands like Facebook to trick users into providing credentials. The ML classifier also flagged this PDF as malicious, reinforcing the observed phishing and redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/free-robux-just-enter-username-and-password-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/free-robux-just-enter-username-and-password-game-hack In PDF document text
    • http://alexanderautos.co/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://alexanderautos.co/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/freerubux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D45 25564 bytes
SHA-256: e961f7130caae30932dff5af6d213222b2d09e1cc71eb0f12ad29be363a5d2a0
font_01_sfnt_off0000886a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886A 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off00009226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 19448 bytes
SHA-256: 4f9e120e202de6bc84ec177104ad4fa84abe9ff586f44aa7e03787aebbe4e81a

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