Malicious PDF — malware analysis report

Static analysis result for SHA-256 79579bfb3aefa5aa…

MALICIOUS

PDF

42.9 KB Created: 2021-05-17 12:33:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1eff7ec4ef33da514302f25d447203f5 SHA-1: 7dc5789c148504ae8721a5d4bcc6f3cf8c9d8149 SHA-256: 79579bfb3aefa5aa111787139682009b2cd72ed8af6abc58d8e2b2d7dd4a1029
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as lures for game hacks and free items. The ML classifier strongly indicated maliciousness, and the embedded URLs suggest a phishing or scam attempt to redirect users to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-t-shirt-roblox-game-hack In PDF document text
    • http://make-up-stettler.ch/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://make-up-stettler.ch/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/optifine-pe_GM479516143.pdfIn PDF document text
    • http://make-up-stettler.ch/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://make-up-stettler.ch/images/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://make-up-stettler.ch/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://make-up-stettler.ch/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/my-roblox-avatar_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
stream_003_off000049d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D4 25704 bytes
SHA-256: 450d65696b7bc9c4205689a9097a4ff55338b9ebd2df472999aeedbc70556cd4
font_01_sfnt_off00008560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 18340 bytes
SHA-256: 2d05e254e9d88d662aa6e20ca1badb4d8e3c9bd921fc5d0ad34db7ef5b503ac5

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