Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cb9ec5203a1337…

MALICIOUS

PDF

44.3 KB Created: 2021-05-11 07:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1c8bfcb9c454161dceeebf4035fa51f1 SHA-1: 325c7fa12ab79d6e5cc2c333cafa3d97f8abc149 SHA-256: f0cb9ec5203a13372f25a3c60991da02ef7df595ea0f46792af39350b355bdbf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free in-game currency generators and hacks for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially malicious websites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/free-spin-app-coin-master-game-hack In PDF document text
    • http://solidcommunication.ch/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FC 24424 bytes
SHA-256: a43aa6874b16d1d71966188afcd7a70a8e2d3d6081adf9460e6eaef17fce831e
font_01_sfnt_off0000820e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820E 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF9 17884 bytes
SHA-256: 5c174c899407ca1572fe1c39ae2452d3abe3cd4971e1cdd162af291bea6e6765

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