Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0e835e96dba722…

MALICIOUS

PDF

46.0 KB Created: 2021-05-31 00:47:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 95658100d77fc713b0f4966fe1a8051e SHA-1: 54fea4e3f5daaae2ccb2dbfc45f0af7036154155 SHA-256: ea0e835e96dba722c3821beabc48c3da93d23c3c365c28908b2ce4f41166990b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as lures for game hacks and free items. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spins-coin-master-2021-game-hack. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9150

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-spins-coin-master-2021-game-hack In PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/rblx-city-free-robux_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_off000047a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A0 25916 bytes
SHA-256: 9cdadaebd9e7a2f97541153c81353d69c247a0535ede4b9ba05322237f1552e7
font_01_sfnt_off00008148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 4624 bytes
SHA-256: e3d74854821f1b4d136bb6ecf8dbf3fb910141da65516764e18fb5391b42f55e
font_02_sfnt_off0000910f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910F 18288 bytes
SHA-256: 9732707b45c862b7a6ef8ea2418900def9be3650c6b325207d932644f64622ad

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