Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb9f8fc981345bd…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 10:23:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fcc855cf651a235758cd058e664b0ea4 SHA-1: 1a22d1a9e947337c62367dcbf8afdd8bcc3263da SHA-256: abb9f8fc981345bd8d5e2ad204b345d567343aa0ca813a74cb58158d1965fdba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as offers for game hacks and currency. The document body and heuristics indicate a lure for potentially unwanted or malicious content. While no scripts were directly extracted, the embedded URLs and the nature of the lures suggest a phishing or redirection attack.

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/479516143/minecraft-mac-free-game-hack In PDF document text
    • http://gruporamos.do/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-no-human-verification-or-survey-or-download_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
font_00_sfnt_off00004a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A74 24540 bytes
SHA-256: af117abf38eb60cc4910ecc36e1bb546672a8f8819ae8280f8de754d38086cc3
font_01_sfnt_off000080ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CA 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6A 17568 bytes
SHA-256: 2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc

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