Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9138b0fb5d24a5…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 12:12:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1337f38d3c2dc85526ad957fbe64bae8 SHA-1: 71c00b8c765da217bcc6475c9be7a8de3fcc3952 SHA-256: ed9138b0fb5d24a5571fd6650702c67d12b6e662551f36cde85656f514669a6c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generator / game hack" lures for popular games. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-link-2021-no-verification-game-hack, is flagged as malicious. The document body, though partially corrupted, also contains this URL and other similar game-related lures, indicating a social engineering attempt to drive traffic to malicious sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest 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-spins-link-2021-no-verification-game-hack In PDF document text
    • https://www.library.kysm.edu.my/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/gain-robux_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-robux-2021_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_off0000484a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484A 24864 bytes
SHA-256: 1edead570ab365e10db85b41bece22d5dee0078eb22f543a8bd41f7e54f8d72b
font_01_sfnt_off000080fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FD 18592 bytes
SHA-256: fb80ad8e35183f753bf91a402d0f68d299ceb73e5cb9a5d171aabc3029406e01

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