Malicious PDF — malware analysis report

Static analysis result for SHA-256 d238918bb0718ad1…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 06:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6b51847aa3db971fabb3506fa3ee8e2d SHA-1: d616451d378953ad784cadb19a5fac862f96fbbd SHA-256: d238918bb0718ad13d9de966fde12c169372e0184c8028b17a90346f6b278c09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The primary URL identified is https://netcdn.xyz/app/406889139/omplete-surveys-for-coin-master-free-spins-game-hack, which is used to lure users into potentially harmful content. The presence of embedded URLs and the critical heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to malicious infrastructure.

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/406889139/omplete-surveys-for-coin-master-free-spins-game-hack In PDF document text
    • http://www.lrnetwork.es/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.lrnetwork.es/images/spin-coin_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.lrnetwork.es/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.lrnetwork.es/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.lrnetwork.es/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/robux-premium_GM431946152.pdfIn PDF document text
    • http://www.lrnetwork.es/images/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://www.lrnetwork.es/images/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.lrnetwork.es/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://www.lrnetwork.es/images/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.lrnetwork.es/images/master-coin-free-link_GM406889139.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_off0000482b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x482B 25200 bytes
SHA-256: d077f9c7cbe99fb040e216285e62f620ba9c98f3099bb8e3e6df224d0f90dc77
font_01_sfnt_off000081c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 18656 bytes
SHA-256: f5273d219e293bffd3c4a8f32ec317fc149346938c6f150a2448c738076cb434

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