Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f88ac35cca87a8…

MALICIOUS

PDF

43.4 KB Created: 2021-05-19 14:43:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87b22d44e30c11495ac121b2d9f46bd4 SHA-1: 1d8251e8d3f571cbde75617229687b71cbcae18e SHA-256: 16f88ac35cca87a842a1c65a4aaeaf10b4fa974f3b422053775ab96364d98d15
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded URLs and text that promote a 'free Coin Master hack', indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to trick users into clicking links that lead to malware. The presence of multiple related URLs reinforces the phishing or scam nature of the document.

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/406889139/free-coin-master-hack-no-verification-game-hack In PDF document text
    • http://apostolosandreaslemesou.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robloxbux-us-generator_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_off00004bc3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC3 24688 bytes
SHA-256: 97b672c3c39c7696d1a0240bcc89b9cc76aa7ce87be0bda5b0bb9627c8590fed
font_01_sfnt_off00008400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8400 19344 bytes
SHA-256: 7f81a8be22fdf241cfbeb8a520db2c09f1503ceca458d8a3dd6c9dbe284011ce

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