Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5536fd1344545bb…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 08:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b3b70788bfdb7581b5ae1c944e92a00a SHA-1: bc58506160272aaa9f2cb18191e95bc3092470e8 SHA-256: d5536fd1344545bbdd4b45e1b5702256fb6a951a66f54758e8d1f72330fdbf26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free in-game currency generators and hacks. The primary lure URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-easy-on-phone-game-hack, which is flagged as a malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful websites.

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.tw/app/431946152/how-to-get-free-robux-easy-on-phone-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/redeem-free-robux-code_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-games-and-free-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-prison-life-before-it-was-hacked_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-como-tener-robux-gratis-sin-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/yandex-disk-download-744d2021b6-robux-cheat-trs-rar-html_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-robux-generator-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/tiktok-free-2021-followers_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-free-and-easy_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off000031e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E4 22444 bytes
SHA-256: 7025237c54430f28db498f4f1953db607b270add54fc0f06f5bbafe0e9e2160c
font_01_sfnt_off000063f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 19484 bytes
SHA-256: 10e6918622a1e1d776f2ac179078ec20795c6faf86adaf8098abaca9041529c9

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