Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec761f752f9c82a8…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 19:03:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3d49ae4fb59e4c837857f766febe767e SHA-1: 5f10c88eb608dfe13caebf4278bacb2cb06547dc SHA-256: ec761f752f9c82a8b413256e6319d0a183159ff0687579bfe9d3676c63e1a349
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, masquerading as a 'free generator' or 'game hack'. The document body explicitly mentions 'free Robux' and includes the malicious URL, indicating a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

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/how-do-i-get-free-robux-in-roblox-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-login-page-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/mcpe_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-rape_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-offers-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-toy-code-generator_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F99 22496 bytes
SHA-256: 1d05f55e71d24bd18dca51e4cdb9768daf2367a2a1b5675e100fbfb10ca5d0b8
font_01_sfnt_off00006196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 19228 bytes
SHA-256: 29527c75ff771c0dff7cd6a487c712874629efd141ae37403d0d53964607d54c

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