Malicious PDF — malware analysis report

Static analysis result for SHA-256 a050844ea461eae2…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 13:00:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 51f24a19d6e7a4877214e14ecee71aec SHA-1: 70b99f7078526565b456ad82c5378187b0e42a3b SHA-256: a050844ea461eae2e8a1e24c463b1dcc4346f9d071d2ee78cf37d1360c434690
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites offering free game hacks and currency, such as 'blox-pink-robux-free-game-hack'. The document body and embedded URLs strongly suggest a lure to trick users into visiting these sites, which likely host further malicious content or facilitate malware downloads. The ML classifier also flagged this PDF with high confidence.

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/blox-pink-robux-free-game-hack In PDF document text
    • https://rietenwinkel.nl/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-coins_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/spin-coin_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-hack-ios-download_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_off00004534.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4534 28700 bytes
SHA-256: 3d3c9f7151a4be6e2ec8304e3e12c6a94788dafccc915010f340b51799d6cd3c
font_01_sfnt_off00008623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8623 18532 bytes
SHA-256: 83476c1cdc4965e32c1b031adf165cbdabd52b50c1595b7bdd37ea4d9a1aed4b

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