Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e20222f35f44350…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 12:53:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cdd543cafc3edf0298442d75eb473f53 SHA-1: 775d5cdb70121b418d6be2bdd6d057bc12547851 SHA-256: 7e20222f35f4435099c849fee818f4c38ad54b1b8e6aeb280406ed32a3f87b1d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one specifically identified as a lure for game hacks. The primary link, http://netcdn.tw/app/406889139/coin-master-free-spins-link-fb-game-hack, suggests a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to trick users into visiting malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-fb-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/how-to-get-400-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/cheat-dungeon-quest-roblox-20s_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/can-you-use-free-models-in-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-no-builders-club_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-scripters_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-hack-mac_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-robux-inspect-element_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-printables-food-labels_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
stream_002_off00002f35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F35 23076 bytes
SHA-256: b91910e9edc361b660eb676e8fda5e8033cb7160610a5724bffa740f49361d98
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 18504 bytes
SHA-256: 062fe6269e74438d6716dc560dc0f4ef08495ebe85ac2ec066b267042f7eab91

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