Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e569d55413c187f…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 12:02:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c0129a7f825f7033b92f7cc5220fa067 SHA-1: a19c7739df21e4dcbd70c55a312aa5e3789e8e6e SHA-256: 1e569d55413c187f089bb008bc9b3a537202fae6951b5dec4b5baf049e094b97
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-websites-that-work-game-hack. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to lure users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-websites-that-work-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn 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-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-minecraft-alts_GM479516143.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_off00004f56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F56 25332 bytes
SHA-256: a6ec824b44a2dfe5f36966ce5f6a91df71609097ad5b11ec66799666aa5dbf0e
font_01_sfnt_off0000892c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 19000 bytes
SHA-256: 7385cf8e30761df55e83d9792ae8d47179260988159899b0069d718a962ca50a

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