Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fd5c366ebe7962…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 13:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6081f83631cfe123edd8450f151b5d9a SHA-1: 3113a7b77c6cc3fa66a5848af5bef36a034fe392 SHA-256: a4fd5c366ebe79628e63a35985f65aa516cecf49bab0900611ccab7374f90e32
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary link, http://netcdn.tw/app/431946152/free-roblox-avatar-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/free-roblox-avatar-game-hack In PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/i-just-got-free-robux-from-roblox_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-500-tiktok-views_GM835599320.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/biggest-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-hack-app-link_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_off000030bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BB 22064 bytes
SHA-256: 9b265346c6e5dd204bafe0c0eb8fda757e2cec6e058611bbe30d59fc989cd611
font_01_sfnt_off0000618d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618D 18868 bytes
SHA-256: 6e6ae3bd63f17b7a84d32be7ea579755ba0a16566dd6134a95c2623afc69ac02

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