Malicious PDF — malware analysis report

Static analysis result for SHA-256 1caf8ec817cf950b…

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 12:32:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 286891afb194303a2eb3785a4226bce2 SHA-1: 6b692203d3f75b28b0cab45de68531ea1b7e7b6e SHA-256: 1caf8ec817cf950be5133153522b7aa4bad586090b96c57fe16d56b15b2b92e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising 'free Robux' or game hacks. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-meme-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-meme-game-hack In PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-generator_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-without-verification-or-survey_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_003_off00004c38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C38 25492 bytes
SHA-256: 251e73b1844b83f43371391167bd628ddedd87e6005102aaece6881f9a5b822b
font_01_sfnt_off00008689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8689 18468 bytes
SHA-256: 3e6db3c9d7b90636a2057efa50536683edf8623f57b31e837fe721178fdf9957

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