Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b65e27f4bd931dc…

MALICIOUS

PDF

47.2 KB Created: 2021-05-10 18:03:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 278875bc82da5357d65af527a3c5c28c SHA-1: 2d0308713ea4604a1a15e49ebca80ac7a051b4d7 SHA-256: 9b65e27f4bd931dcbd1e0225942e6f70e58c646ea165fe606da40988e5c4aa61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generators" or "game hacks". The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-hack-and-get-free-robux-game-hack. The document body, though partially corrupted, also contains references to this URL and other similar-looking PDF files, suggesting a phishing or scam attempt to drive traffic to malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/431946152/how-to-hack-and-get-free-robux-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5B 25988 bytes
SHA-256: 89080f8240d2acdfb98f14218db41ea122fc2508c412e9e9702003905a7f3c60
font_01_sfnt_off00008739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8739 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000944b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944B 18856 bytes
SHA-256: d1af75e50eba08e00cb44d21026f4cdbf29920fa5250f1112d9d0eb56b6eb802

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