Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edc1feed45d2896…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 03:12:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 55e8a88c6d8cd470fa501f4f7e574ec5 SHA-1: c0e9b30479c95ac3ed75a1aacee9fe1a447cf4f3 SHA-256: 3edc1feed45d289627878f144cf76ce4591da052f8a1a4f750cb8cbf2acb0b61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website advertising game hacks and free generators, a common lure for phishing or malware distribution. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure. No scripts were extracted from this sample, but the document body and heuristics strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/how-to-hack-roblox-robux-pc-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-find-free-helicopter-in-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/hack-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pubg-uc-app-download_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pokemon-go-free-4k_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/ww-roblox-come_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_off00004f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F6E 26484 bytes
SHA-256: 9939f1684e0c2ef38698c661e5401440cc72e03a9d3111c4d33aa497309f5067
font_01_sfnt_off00008bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC1 18640 bytes
SHA-256: 917b9f8ec99c498fa9833b969f7263a2fc47bae6c643aa2cdf8c91a6340ea9e3

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