Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8ec893946e8322…

MALICIOUS

PDF

44.2 KB Created: 2021-05-10 16:33:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e1af87e29132efe7f58f5b902dd3b255 SHA-1: 7a89edfbf55f182d28319884f4539535aa6b056e SHA-256: 5c8ec893946e8322303adaa52847757a45b97572682ae5cf523154829691c1b2
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into downloading free game items or currency. These links redirect to malicious infrastructure, including a known redirector and an IP address hosting further malicious PDF files. The document's content and embedded links strongly suggest a phishing or scam attempt, likely intended to deliver further malware or compromise user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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
  • 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/download-coin-master-free-spins-link-2021-today-game-hack In PDF document text
    • http://36.94.36.7/elib/repository/roblox-free-hair-girl_GM431946152.pdfPDF link annotation
    • http://36.94.36.7/elib//repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/easy-robux-com_GM431946152.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/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-download-minecraft-java-edition-for-free_GM479516143.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_off00004b34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B34 26760 bytes
SHA-256: 8eefba835fdca61b60a969f4583991f258eaee1ad584734bf17865e5681cc16b
font_01_sfnt_off000087c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C3 19220 bytes
SHA-256: 525b4923e2ec08582fc0eec02dda3c6a08e890396aaafa489cf9c2f67061961a

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