Malicious PDF — malware analysis report

Static analysis result for SHA-256 203046a1ed819ce9…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 19:50:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 21e391a387db66d8cfd127bb1505f29b SHA-1: d4206daa513a13a871c103d637f49a764defd621 SHA-256: 203046a1ed819ce95027bf18fc3ce27bbf6bd8f400c45a395ddb1f3b595a47c5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 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/431946152/roblox-free-download-game-hack PDF link annotation
    • https://delsys.com.tw/image/data/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-top-model-hack_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-fan-free-games_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/tiktok-free-movie-hack_GM835599320.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-free-privat-server_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00002cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD3 22412 bytes
SHA-256: 1680f659d8e9f1f71949f8005546f7dfbf3ed7b6a6623346578a2e368c33d6cd
font_01_sfnt_off00005ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 19156 bytes
SHA-256: 488cf91c5852f61976a75c157190bc68970b6643a3b61c25d9d957a5e6cf376e

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