Malicious PDF — malware analysis report

Static analysis result for SHA-256 084520687f024041…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 00:52:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 34a8388d57528aec059fd5929246db70 SHA-1: 1d4f677d64bfa372768595a9760c654fda145817 SHA-256: 084520687f024041adca7ac2f78805827262d1204e0865926371e36afd9f556a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free in-game currency or hacks. The primary link, http://netcdn.co/app/431946152/how-to-get-free-robux-without-downloading-any-apps-game-hack, is associated with a game hack generator. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead the user to a malicious site.

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-to-get-free-robux-without-downloading-any-apps-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-slurp-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-arsenal-free-vip-server-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/chams-hack-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/comment-avoir-des-robux-sur-roblox-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacking-forums-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-texting-simulator-money-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/to-to-hack-robux-using-script_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-items-code-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/pubg-uc-price-in-uae_GM1330123889.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-boys-and-girls-hangout_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_off000030c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C2 22180 bytes
SHA-256: bd50c12bdaf895d499e86f7f64258b462d288bcd842d9598bb0bb2ad1d409a09
font_01_sfnt_off000061ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 20240 bytes
SHA-256: 297e40e48bf98f909157546786ed8ef6c846caf78719244298106c3264496c18

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