Malicious PDF — malware analysis report

Static analysis result for SHA-256 c249070447777e13…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 09:34:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c9fa005cc01e2f535034b66230530a6e SHA-1: f07a5711f0ea67355e7df7dd0c6ffd289b6ed957 SHA-256: c249070447777e1312d656c5d4fc3ba28388d4e6436a3ac88f270b431412a1f3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a 'free generator' or 'game hack' to trick users into clicking malicious links. The document contains numerous links to redirectors and SEO-optimized PDF link farms, aiming to drive traffic to potentially malicious sites. The primary malicious URL identified is http://netcdn.co/app/431946152/claim-free-robux-2021-game-hack, which is associated with known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/claim-free-robux-2021-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-a-free-roblox-necklace_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/codes-for-adopt-me-roblox-for-free-money-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-free-robux-for-wiewers_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/addrobux-us-roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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
font_00_sfnt_off00002dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCC 22236 bytes
SHA-256: a85403464274ce11e4ac328dbc03904b9f21c245d79cb74f27bf5c6aa90c58c7
font_01_sfnt_off00005f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 19572 bytes
SHA-256: e2a70c361cce8918451dbd453ed2625daa16f1703b076e8801d8ca2fa6dc8dca

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