Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3159c729294217c…

MALICIOUS

PDF

44.9 KB Created: 2021-06-08 16:16:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 42028a1e4ff8ab3196115c8b8e296f8a SHA-1: 652485f557cfd68c5f3db3b60255d9863ef14f78 SHA-256: f3159c729294217c7bafd495990b12edf30929e90b74e8ce54af0117ad207b91
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains that promise free in-game currency or hacks, such as Robux for Roblox. These links are designed to lure users to potentially malicious websites. The presence of embedded URLs and the ML classifier strongly indicate malicious intent, likely as part of a phishing or scam campaign.

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.tw/app/431946152/how-to-get-1-000-000-robux-free-game-hack In PDF document text
    • http://algierimasonry.com/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-hack-generator-online-no-survey_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-500-tiktok-likes_GM835599320.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_004_off00004f28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F28 25920 bytes
SHA-256: cb0f008c5ae03b5c7f2119a7106915865d7cb925d41218588ce05579d8d233e6
font_01_sfnt_off00008c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C06 18560 bytes
SHA-256: ebe7febd7c9c87dba90e20cfb7f210acfd9bc8f8383e28ef55b41a5f3c0fccc9

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