Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff8d46951582f1b…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 04:54:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3f2e9a2c7e7192e59d7c47f7e54a025a SHA-1: a66e23c21daee72cb86c52e7674e1c607ba196c2 SHA-256: 2ff8d46951582f1bdd006b9ba0101b37204b65d9e1469478050a4cd50e8cb64b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, including one that masquerades as a "free Robux generator". The document body and embedded URLs suggest a scam or phishing attempt, likely designed to trick users into visiting malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/oprewards-free-robux-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-robux-for-free-2021-pc_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_off00004d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D00 24492 bytes
SHA-256: 50fc1e884322159dcf992d80d94ee65212ed745acf99a983e5944c762989ebcd
font_01_sfnt_off0000855c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855C 18756 bytes
SHA-256: ea6a04d6c65882c9dd78ee7ca96c70e45062fdc6b69d68e2fcdc099d3abb6428

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