Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3b9c7da0f83997…

MALICIOUS

PDF

42.6 KB Created: 2021-05-19 08:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c53e48e62e2697a33c7c38073eda10b6 SHA-1: d27b1da3e9617117753034a656f7f35b88119bc8 SHA-256: 7f3b9c7da0f83997f3dd61f60024e9e95b025e697e726e0f68fd3688863286ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a document body that promotes a 'Coin Master Free Daily Spins' lure, aiming to trick users into clicking a link. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect users to a download site. No scripts were extracted, but the overall pattern indicates a phishing or malware distribution attempt.

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/coin-master-free-daily-spins-game-hack In PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/cheats-to-get-free-spins-on-coin-master_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_off00004a4f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4F 25320 bytes
SHA-256: a5e9e74247601695e3727a7127fbc06fdd48bec83f00ca17c003bf9a888fe5fc
font_01_sfnt_off00008406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8406 18308 bytes
SHA-256: 5c3cefeee4a209382fad51155f4ab19c665f35dca270fe96ae1b58d23c3d8f95

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