Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd97c2c6b5a1649…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 19:25:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 62cad82f8375cc4dadd583db8ed6ba9e SHA-1: 1fdf8580f466cb51b3c1369146bfbfa8014f4df5 SHA-256: ecd97c2c6b5a1649663cb1a6189a279a26431ebe58cd5bdf005f8cda1340e036
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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/431946152/pmoney-hack-sur-sunset-city-roblox-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-a-tool-in-fe-yield-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/tat-ca-cac-do-free-trong-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/gift-cards-for-robux-free-codes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-world-pw-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/pokemon-go-free-walker_GM1094591345.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-exploits-for-roblox-online_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/where-to-find-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/who-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-peoples-account_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hes-hacking-roblox-phantom-forces_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_off00003066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3066 22316 bytes
SHA-256: f560320f12ba663ce9ab4f88290a7683b395b32f18cce9600e1b5935bf6d6244
font_01_sfnt_off0000622c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622C 19428 bytes
SHA-256: 96b686bdf047a7257fe73f4cbf4c0183db110f3876d52e0296b922e2da3ce4b8

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