Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c91c5e1ac913c1…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 10:03:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 17391e23c757fdc1c8a3480d50a63fcb SHA-1: d9b6830035d86a15ed43ea3c1e459ed6efa6f476 SHA-256: a8c91c5e1ac913c14f9c60ef0dc347c551d7052dc9415f397d87a1246923e0d4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as free game hacks for Roblox. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-get-any-jailbreak-car-free-game-hack In PDF document text
    • http://cmme.it/images/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/roblox-account-stealer-hack_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/free-printable-roblox-cupcake-topper_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/best-free-roblox-explits_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/roblox-free-followers-bot_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/como-usar-hacks-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/how-to-get-free-teeshirt-roblox_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/roblox-robux-hack-no-survey-or-download-u-said-tags_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/how-to-get-robux-for-free-on-laptop-2021_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://cmme.it/images/roblox-groups-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/roblox-hack-peoples_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/free-followers-on-roblox-generator_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/kupcake-hack-roblox-64-bits_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/triga-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/free-robux-no-survey-no-download-no-offers_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/roblox-how-to-get-ninja-animation-for-free_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/a-old-roblox-account-free_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
font_00_sfnt_off00002e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2B 22256 bytes
SHA-256: 652c382d46be9afa7517d0ad3ee8fac54cbee5cee891fdb22eaf55d55d2eed4b
font_01_sfnt_off00005e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4C 19388 bytes
SHA-256: a57200d7b9aae8943db43d81a4e3579e8883803fbbaa47b01eb0cb1c6b403902

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