Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ec426d92c42366…

MALICIOUS

PDF

35.8 KB Created: 2021-06-25 18:29:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b0072020fc716973853766776dddf06a SHA-1: 4c095ba9ae68824d5ef4b492f4f5a9ce43f925c7 SHA-256: b2ec426d92c4236679bb84c3aacc4d41fca52ca28878bdaedc4ebf715ad3990c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as 'free generator' or 'game hack' lures. The primary URL, http://netcdn.co/app/431946152/how-to-get-shirts-on-roblox-for-free-game-hack, is a clear indicator of a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malware downloads.

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.co/app/431946152/how-to-get-shirts-on-roblox-for-free-game-hack In PDF document text
    • https://lib.bunghatta.ac.id/app/repository/custom-admin-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-make-free-robux-in-roblox-2021-no-fake_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/pokemon-go-free-pokeballs-no-human-verification_GM1094591345.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-be-a-builder-club-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-rex_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-de-com_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-dragon-ball-final-stand-cheat_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/infinite-yield-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/new-hack-roblox-2021-rbx-june_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-hack-fr_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-kid-friendly_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
stream_002_off000031c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31C4 23356 bytes
SHA-256: 7c7c93100b41d1b2cf43fcdb34ac785d8e750b6cc1428e0ffe4a56383ec7e2af
font_01_sfnt_off0000669a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669A 19204 bytes
SHA-256: 4ca969ebd77b9fbb3d704324967739ed9ec5bcaeb37dbd11de2315b4aac92d8a

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