Malicious PDF — malware analysis report

Static analysis result for SHA-256 1440bdec5afae3cb…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 21:58:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eed1399763f8bc95ca953e2b1338bbd3 SHA-1: 101e753a20e29f7bc99cc91f22df6dc0c723da87 SHA-256: 1440bdec5afae3cb535caca6fd078065b5c32f24ec09a7bbb25fc2eb44de4f1d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free Robux and game hacks, containing multiple links that redirect to malicious infrastructure. The primary redirector URL identified is http://netcdn.tw/app/431946152/games-that-give-free-robux-game-hack. Although no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

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/431946152/games-that-give-free-robux-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/pubg-uc-hack-app_GM1330123889.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-cheats-for-robux-pc_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-retail-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/fake-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/does-free-giveaway-game-actually-gives-you-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/my-roblox-account-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-with-console_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-god-mode-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins--coins-2021_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_off00002e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2E 22036 bytes
SHA-256: dc9ba80db624b8f5e0671447a532cdb7d7678d270ddcb88ac321e5c456cce598
font_01_sfnt_off00005ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF1 19480 bytes
SHA-256: a134365561edbdff80a1502dd404e307ea3328ecb7bf3d1da0fbfee9abe6ee6f

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