Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5c144d684c26de…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 12:45:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 951fdb8338e902c9830f4b0a450691f9 SHA-1: 0940292b826a9b0607ab815294a3c3e92d083554 SHA-256: 8d5c144d684c26de0801df588f6ec6f025fb808f24418a631b51a1ba8275a8a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure, specifically advertising free game hacks and generators. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the primary attack vector is the redirection to malicious sites.

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/479516143/free-minecraft-alt-generator-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-robux-for-free-on-laptop_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-gamemappses-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-ultimate-driving-cheats-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/big-brother-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-cheat-at-boku-no-roblox-remastered_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-apocalypse-rising-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-net_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-yourself-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-followers-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/gameblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-how-to-use-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-sit-fly-hack_GM431946152.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_off000032b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B6 22232 bytes
SHA-256: 613c339cb0d69692350d31d7e72d9e4f48c41e993e7dc35a05478117154e8afd
font_01_sfnt_off000063de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 18072 bytes
SHA-256: c8f7285ff86763399e2a5ac55585dfb2fc2dace9f282f455ab031e88ea571d9c

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