Malicious PDF — malware analysis report

Static analysis result for SHA-256 d422e70ca3e8df39…

MALICIOUS

PDF

35.3 KB Created: 2021-06-22 05:48:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2d5b8d2d51fad73af98424b15ac652cc SHA-1: 3a7f4a8d29c8855953b956d6abfd9625d4383cac SHA-256: d422e70ca3e8df39a19095b3cea571550f6d393cd9ddbce72fb80068d9fc3868
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free in-game currency, directing users to a malicious redirector URL. The ML classifier strongly flagged this PDF as malicious, and heuristic rules identified it as a game hack redirect lure and a link to known malicious infrastructure. The document body contains the primary malicious URL, suggesting an attempt to trick users into downloading potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-menu-roblox-download-game-hack In PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-free-money-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/hack-to-log-on-any-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000319c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319C 22568 bytes
SHA-256: 6f6d4d522fae7cb09b004653031a9cde038f57312f06b448c94aa0bc51d940e1
font_01_sfnt_off000063b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 19496 bytes
SHA-256: 45a692d3326e02b61a75edd00b4be097ab0343944001f0cbf1ce6c6bd430e807

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