Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f749229d3ba6314…

MALICIOUS

PDF

46.5 KB Created: 2021-05-19 02:15:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 69b23d74a77a05962055429c42214ad9 SHA-1: 20d824d238549d1b2a963bc6e86ce47ccfa94046 SHA-256: 4f749229d3ba6314eb99cc931f768d83bccd947b55fed34bdf940cf32288d898
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/835599320/tiktok-free-key-game-hack PDF link annotation
    • https://www.wessexandrology.com/uploads/files/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/roblox-but_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/master-coin-free_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/spin-coin-master-free_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F8 28136 bytes
SHA-256: b636e3935849e613ff9ff3b58c282f697eff53df854c692926315c104843cf5d
font_01_sfnt_off0000877c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 4148 bytes
SHA-256: db7ec909c907b23088a98ecd4cd288b476f2f66785a6e3d81bc6469138abe306
font_02_sfnt_off00009552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9552 17636 bytes
SHA-256: d657322e27a0f8cf47cb57122b85ae03737d2910e139bd6eba7bf248a0e49272

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