Malicious PDF — malware analysis report

Static analysis result for SHA-256 a876c144029577cd…

MALICIOUS

PDF

41.5 KB Created: 2021-05-19 22:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cebe1259f7a61d4fd66648410739ea6d SHA-1: a24569677389e5a5af782b21f0f78cfcbf4792a9 SHA-256: a876c144029577cdeb47af4aca365be72fd051b79e35009295e63212ce09812b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for games like Coin Master and Roblox. The primary lure URL is https://netcdn.xyz/app/406889139/daily-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malware downloads.

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/daily-coin-master-game-hack In PDF document text
    • http://elearnfactory.com/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://elearnfactory.com/images/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://elearnfactory.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/free-online-generator-for-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_off00004737.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4737 25436 bytes
SHA-256: 8a6f261aacbe1af801dcca6c1024e80e01652e345b869ba4f78538b5e5c568ea
font_01_sfnt_off000080a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A9 17968 bytes
SHA-256: 88a0d731d7b381574a006ca944c17241aad840c2b11367d7b1a0c0a64bb163ce

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