Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f10b0cd694beb2d…

MALICIOUS

PDF

46.1 KB Created: 2021-06-11 00:15:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 24280dd2f3c9a7bdc41439d9cfd4a79c SHA-1: 8d73b9ad6b1e49d8f258de47c169964dde4e83cf SHA-256: 0f10b0cd694beb2d70fb90a9ab2cc6b53150b1fc73015a83af75d2aaff6a4bb6
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators' as a lure. The presence of a 'download button' heuristic further suggests a malicious workflow intended to trick the user into downloading a payload. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate an attempt to exploit user interest in gaming for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-more-than-20-letters-in-username-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hacking-community-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hack-unlimited-free-robux-tickets-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-welcome-to-bloxburg-money-cheat-august-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-free-merch_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-heists-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-report-hacker_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_off00005271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5271 25476 bytes
SHA-256: 88d1aebd7c052da0255a04a626244f5144109468af9317e0f00175f6c2566eb8
font_01_sfnt_off00008e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E08 19556 bytes
SHA-256: 3b72a93e285f013ca52fecc1b918898a62e5056c84b1f94465fadc1f548689cf

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