Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4d523f95b7299d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 16:42:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: faae4b1b065094770bb97f6a972d0670 SHA-1: b78a9b8ec7e590660460ca1d9b751e7a3b521b9b SHA-256: 1a4d523f95b7299dd254fa709d49aade73ae8ac93eae4eb39d1de809d1bf0d7a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'Roblox Free Hats 2021' to trick users into clicking a link. The primary link, http://netcdn.tw/app/431946152/roblox-free-hats-2021-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or download sites, aligning with common phishing and scam tactics.

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.tw/app/431946152/roblox-free-hats-2021-game-hack In PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/hoiw-to-get-free-robux-on-promotion_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-cheat-engine-use_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/websites-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-online-games-like-minecraft_GM479516143.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_off00002eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAE 22440 bytes
SHA-256: e3e3e9847770b50c07230dbe335d6ec30cc0e381b9aa5b2bced3bc503dc1ce8d
font_01_sfnt_off0000610a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 19156 bytes
SHA-256: 9d163482444c23490305235f272b0c90443c33c239ff78a1b4add1960f9a6324

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