Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e19617be07ed833…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 05:35:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 68c245784ee1a7dea03fba0aff9571dc SHA-1: 08b8b208b61266021adb6e006b85482fb4bb546c SHA-256: 3e19617be07ed8330014e2b7cee55d360b59add1847e6ef4aa1e58ad5aaa42ab
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to free Robux and game hacks, directing users to a known malicious redirector. The document body and heuristics indicate an advance-fee scam or a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit user interest in gaming to deliver a malicious payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.online/app/431946152/free-robux-codes-on-roblox-game-hack In PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005337.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5337 24780 bytes
SHA-256: 3406743b5d584248ccf0f7cc64e1cf6b00b9e0f16bb49873bb93f0e0f27948f4
font_01_sfnt_off00008a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6C 18260 bytes
SHA-256: 12a1eae497329e69006a5a7dd3b9bccc65b2cb81e6c091f267a1827d1132ba1c

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