Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcb9cfeb8ad469b…

MALICIOUS

PDF

45.6 KB Created: 2021-05-19 15:13:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 26f6af264bfb7154bb240d62157c603d SHA-1: 89b111e125aa64c2340c1f8bb8acd7bbb38a6213 SHA-256: 1fcb9cfeb8ad469b44364f7891a1f0e47bad2af986de82e1b472b4f251e07350
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to websites offering 'free Robux' or game hacks, indicative of a phishing or malware distribution lure. The presence of an MFA lure suggests an attempt to harvest session tokens or credentials. While no scripts were directly extracted, the PDF structure and embedded links suggest it may exploit PDF vulnerabilities or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/rbx-free-robux-game-hack PDF link annotation
    • https://duoledesign.com/image/data/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/robux-gratis_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DC 26360 bytes
SHA-256: 43765c8eb70530d03d758e67f4464d20404ef367783421f6ca035d180358623b
font_01_sfnt_off0000861b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 2984 bytes
SHA-256: 2df87bbe4e27b27e34c872c092d0522acd977d05f5cbde7ed5e1fdfeb59cb318
font_02_sfnt_off00009068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9068 18012 bytes
SHA-256: 03f7603bc8a5695bbd0c39958af3fcfd5a932cbc13eba7563a8e8ca8b5ca4208

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