Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0ddf78132f919e…

MALICIOUS

PDF

48.1 KB Created: 2021-06-08 18:06:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c5cb486ebbbac4dcc0d365b8bf5df6d5 SHA-1: 80ece13869c5ac433d1bd4479f693fc178d804ec SHA-256: fd0ddf78132f919ef71fd8240980075491e7f0abd6fedd03384150e87cabd3ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hack generators. The primary lure is a link to 'zombie-rush-hack-roblox-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack, likely initiated via a spearphishing attachment. The ML classifier also flagged this document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/zombie-rush-hack-roblox-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-enter-cheat-codes-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-2021-free-spins-link-2021_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_004_off00005155.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5155 24792 bytes
SHA-256: 702ceda92d7fe6ede035d287fb97b5865b3925486d8e3f4a734e8c17c8a18bc6
font_01_sfnt_off00008a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A46 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9758 18960 bytes
SHA-256: 53900bdeb606209d7a69342ecaddcf8f1971eff26364f05bc7f758c5473f87d5

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