Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d0ae58fd7a74cc…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 12:44:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3619a3c95f81923762eb4e75e5303f8c SHA-1: 3caa1fd81cb6c0887ffd41d410da9ceeaf0b6d06 SHA-256: c0d0ae58fd7a74cc4635f59e779849644d15eb32651a005c79134032a90711d4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, http://netcdn.tw/app/479516143/free-minecraft-java-server-game-hack, which is designed to lure users with promises of free game hacks or currency. The document body and embedded URLs suggest a phishing or malware distribution scheme, likely leading to the download of a second-stage payload. No scripts were extracted, but the heuristic firings strongly indicate malicious intent.

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.tw/app/479516143/free-minecraft-java-server-game-hack In PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-no-survey_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-vip-server-for-speed-race-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/his-girlfriend-cheated-on-him-in-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/is-there-an-actual-real-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/earn-5-robux-free_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-cheat-codes-free_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
font_00_sfnt_off00003147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3147 21564 bytes
SHA-256: 87addad7f442271ecfd0f5d87701838f75fe057c6dc402806a00a83fafc2dfab
font_01_sfnt_off00006049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6049 18136 bytes
SHA-256: 79ce7aa8dec46b2fdcf29b8d0048edf05813e69cc12e123608cbd366e975b5c1

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