Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea6b204028952a2…

MALICIOUS

PDF

44.2 KB Created: 2021-05-15 00:21:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6a4fca665173ac04e3c6eb05aac66a6a SHA-1: 731000866e74913024d1ee892c90010059623c95 SHA-256: eea6b204028952a29dcf9956298a3b4920a1bc4c0c9e94990d4cbf7735d73f6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically targeting users with lures related to game hacks and free generators. The ML classifier also flagged this PDF as malicious. The embedded URLs likely serve as the primary mechanism for delivering a secondary payload or directing users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-spin-link-coin-master-game-hack In PDF document text
    • http://urezerv.com/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://urezerv.com/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://urezerv.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://urezerv.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://urezerv.com/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://urezerv.com/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://urezerv.com/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://urezerv.com/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://urezerv.com/images/my-robux_GM431946152.pdfIn PDF document text
    • http://urezerv.com/images/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://urezerv.com/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://urezerv.com/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000485e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485E 24496 bytes
SHA-256: 4889eadbd9de75b8bbf6cc70ef2d5861b5b6af2b7b31c9fc6581c474eb04e246
font_01_sfnt_off000080b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B9 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD3 18056 bytes
SHA-256: 5e0e5252c5991e876b89620e8fc451db275611f7bed2c8d0b16d9c89ed4fe559

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