Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6533e7d67edca4d…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 07:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 59cda936362be3c2f4da92da8ce44036 SHA-1: 2624a779615b3a4b5dd87b063bad283d0da43b4e SHA-256: e6533e7d67edca4d42ae53d802e0246043b9f6fb679cbed4d70b534be5e79fce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a free generator or game hack. The primary link redirects to malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for further malicious activity, such as downloading additional payloads or redirecting to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-buy-robux-for-free-game-hack In PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/xray-mod-minecraft-114_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_003_off00004b6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6F 25480 bytes
SHA-256: 9d2be7e28560455b94acfe8fdd9bc3b97086a3e35b58bfea15f05df9ec2e5af6
font_01_sfnt_off00008451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8451 18356 bytes
SHA-256: 42cf6025b0828d48dcef6abba26d08473f6f67d2383591dd07323470bab2f866

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