Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f5bec84ce548f3…

MALICIOUS

PDF

44.0 KB Created: 2021-05-11 17:39:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 63207c68d9082792417ee3b6c01a9e96 SHA-1: 9d463a868a539347ab59ffe1cad6e4ec2813e6d9 SHA-256: 82f5bec84ce548f34c8bb8b4c19d3abbe40ec3551f454560ff9d960fee83831c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as "game hacks" or "free spins" for popular games. The primary malicious link, https://netcdn.xyz/app/406889139/coin-master-hack-co-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. No scripts were extracted from this sample, but the presence of malicious redirector links and the lure content strongly suggest a phishing or scam attempt.

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/coin-master-hack-co-game-hack In PDF document text
    • https://www.knjigebuducnosti.com/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/robux-cheat_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-spins-on-coin-master-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_off0000491f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491F 29808 bytes
SHA-256: 17245f0e896904e9c254818c9a1bec6e1485eca3476d6470aadef5d76264ee85
font_01_sfnt_off00008b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B89 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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