Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0de2465303f960…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 15:25:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7a5b77eaad6aba96bba24b588c73af2c SHA-1: 0a5ed0ab2a1ffd52fff76b9103abe3b5de3c534a SHA-256: 8c0de2465303f960428c556d3718b93577c2c1016687ce83b80ab972ec8b23e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links, including a primary malicious redirector at http://netcdn.tw/app/406889139/coin-master-free-spins-daily-game-hack, which is known to host malicious content. The document body and heuristics indicate a social engineering tactic to drive users to potentially harmful websites. No scripts were extracted, but the embedded URLs and redirector behavior are strong indicators of 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/406889139/coin-master-free-spins-daily-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-admin-on-any-roblox-game_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-in-2-mins_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/suits-shirts-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-do-you-get-free-robux-on-roblox-pc_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-items-that-are-now-expire-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/guest-pants-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/tiniest-roblox-avatr-with-free-items_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-robux-hack-generato_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-noneuy_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/what-games-give-you-free-robux-no-scams_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-catalog-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/dragon-ball-fury-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-roblox-jailbreak-franais_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-download-windows-7_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-accounts-generator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-jailbreak-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/combo-with-free-hats-roblox_GM431946152.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_off00002da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA1 22700 bytes
SHA-256: ccaba68459b9a98e3e762556503e3f50f6e11742e163e8e4e51e47392dfa4e83
font_01_sfnt_off0000607a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607A 18596 bytes
SHA-256: 9b8358e598e07f7d28a63a566b047adfcbccaa59c97f3816d59e3cdcc62e8d14

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