Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e5b803e585ab85…

MALICIOUS

PDF

42.8 KB Created: 2021-05-19 01:06:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 387d974a113c0995e0d48cfb89d1d6b6 SHA-1: 040e11b5b59a1e9fb2287498df036cecbeb16fca SHA-256: b6e5b803e585ab8523aa18813b1bfd1d5f71a8f8e668956082b962b373e0f11a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to lure users into clicking these links. The document body and embedded URLs suggest a phishing or scam attempt related to in-game currency or items.

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-cheat-codes-free-game-hack In PDF document text
    • http://fccsms.com/images/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-hack-apk-link_GM406889139.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_off00004885.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4885 26580 bytes
SHA-256: 609a1051a7c0d77e41b5fd0120c8d1d6c1ee696b36e025885c02ce5eeeec3b7d
font_01_sfnt_off000085d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D0 18052 bytes
SHA-256: e1f7dc216c669c22560805cc0a50cb8b77f141bfe6c38f33d25df223dbe053b5

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