Malicious PDF — malware analysis report

Static analysis result for SHA-256 713db4eaa97efc82…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 12:23:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b0bbf84f041ec5c78efcf004adcecbde SHA-1: a9ab8855317638dd62129cc0f0b92375201ec890 SHA-256: 713db4eaa97efc82f872ab22fcb7af309b428473532fa40a6e3a56f48ccb1bbd
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 game hacks' and currency. The primary lure appears to be related to 'free Robux' for Roblox. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful websites. No scripts were extracted, but the PDF's nature and embedded URLs are sufficient indicators of malicious intent.

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-robux-no-survey-game-hack In PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/pubg-uc-200_GM1330123889.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/best-sword-in-fight-the-monster-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/roblox-hack-scrip-boooga-booga_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/pubg-uc-buy-online-pakistan_GM1330123889.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/hack-programs-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-free-robux-mobile-root-needef_GM431946152.pdfIn PDF document text
    • http://pustaka.minangkabau.unand.ac.id/repository/you-promised-my-son-free-robux_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_off00002f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F07 22548 bytes
SHA-256: ad895cb03ba2fa33e2b790b52515e38f5dc13a03b9206b216945ac2474a8f076
font_01_sfnt_off00006153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 19012 bytes
SHA-256: 4e4ee538de79ec7e4a2325d57c934275716f5f92a64f1321ae55620a5fe6760f

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