Malicious PDF — malware analysis report

Static analysis result for SHA-256 5955247c90ed7009…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 09:52:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a47bf6e41c99fc0ea25e2c27e1b6e2ac SHA-1: 8f28517d343f57af2dd03e8e1c9e832eb593c902 SHA-256: 5955247c90ed7009d507337f9d6b8d734c87168a9c123c3e505ac649c79fa1ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/scripts-free-roblox-2021-game-hack. The document body and embedded links suggest a lure for game-related cheats or generators, which is a common tactic for distributing malware. The presence of multiple redirector links indicates a strong intent to lead the user to a malicious download or exploit site.

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/scripts-free-roblox-2021-game-hack In PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-robux-generator-cheat-files_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/get-free-obc-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/robux-gift-card-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_off00002f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8C 22516 bytes
SHA-256: 62768885dd5507d2ee52c6eb3488028ebfd33321b4f3672534cae56247ae5abf
font_01_sfnt_off000061e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E9 19452 bytes
SHA-256: 39b2ab891a0ca2f4882bc2e03fc62d04d55d9eeb7248e241c99f63c9debda8e4

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