Malicious PDF — malware analysis report

Static analysis result for SHA-256 c057d6a92663cd6a…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 16:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 43d9db370c35f8e581f37b4d912ae0f1 SHA-1: 31017aefa4ae322bb38d3b19d5b5cc7873f269f5 SHA-256: c057d6a92663cd6a8d7858b9056c57046cdc7edc548206b86b2e013ed9b1a249
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/80-free-spins-coin-master-game-hack. The document body and extracted URLs suggest a lure for game-related cheats or hacks, likely intended to trick users into downloading malware. No scripts were extracted from this sample, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/80-free-spins-coin-master-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-stuff-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-animations-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/pubg-uc-500_GM1330123889.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-hacker-look_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/good-unifrom-making-software-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-rewards-free-spins_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
font_00_sfnt_off000031a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A1 22720 bytes
SHA-256: a04324f7d7e8dbf7335a1f1c78a499d4f1d25cb41c3ba4cbf062a0e44aed1494
font_01_sfnt_off0000642f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 18556 bytes
SHA-256: 6aca12d1c5311c20ad8447472a8f74efe8546887157b26755d8bdae78e98e7b0

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