Malicious PDF — malware analysis report

Static analysis result for SHA-256 995c0dd15bdb3ea0…

MALICIOUS

PDF

47.1 KB Created: 2021-05-16 19:28:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 96ebc0f2a59ba1fa4c181957550328f8 SHA-1: 4bf1b75cb0ea04bc0d45cd48f649cf41a9bbcf9b SHA-256: 995c0dd15bdb3ea04811ca008573318f2a8eae24d20422ee71e32322fc748c5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, including one explicitly identified as a 'game hack' lure. These links likely lead to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-lucky-patcher-hack-game-hack In PDF document text
    • http://kulturlandschaften.eu/images/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/all-coin-master-spin-link-and-free-download_GM406889139.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_off000049a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A8 30484 bytes
SHA-256: 16a6b35f92e4417af2e6c377bda96dff9c25d8aefc2be5d527c7e68d18f749d4
font_01_sfnt_off00008bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000095a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95A3 18356 bytes
SHA-256: 48d2456a70e0b436a66ea7754c0c12eb0fff45cce4d0a828759cadba1e6f893b

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