Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ac1114461b47c8…

MALICIOUS

PDF

43.9 KB Created: 2021-05-10 19:46:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bdc9701babfe66ee5a87fd88d197427d SHA-1: 4e2c8ddc85f2bbcc2f61006b3871d15a86863077 SHA-256: c5ac1114461b47c8a2a3a54f1a065d55ba9c4c09e7c25989b9f42ad5b850862f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9969

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/406889139/coin-master-hack-mod-apk-free-download-game-hack PDF link annotation
    • http://36.94.36.7/elib/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfPDF link annotation
    • http://36.94.36.7/elib//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/robux-money_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C0 30456 bytes
SHA-256: b935f75a4b585a8b1c298498131adc983d2123fa874ae4d517b62f67a0195d4a
font_01_sfnt_off00008871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8871 18636 bytes
SHA-256: f35a088bb389889b7dbdb2955ea981e64c4ac43926c2f49735e1909520ee0b52

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