Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a322ad4089c2fa…

MALICIOUS

PDF

32.9 KB Created: 2021-07-06 02:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a4d65019c0f7f9f03e8f2b29bcf608bb SHA-1: 4e9e38bd50071fff3f659c4d0a1991dc998d4d81 SHA-256: 97a322ad4089c2fab0768d1456dbae45601f86da256a8c3050a7fe580446c7f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/431946152/robux-only-game-hack, which is flagged as a known malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt designed to lure users to potentially harmful websites.

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/robux-only-game-hack In PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/robux-only_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_off00002d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D41 21296 bytes
SHA-256: 754b3c226fd5797d3f0e0c8f6c50d843594c92ffa15370e292609bb04a62d0e3
font_01_sfnt_off00005bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD6 18804 bytes
SHA-256: 7bf9ba5b177637dea7a50793fb8fa5d71c9c17afa1ebc40a40c983603a9d1889

Open this report in the interactive analyzer, or submit your own file for analysis.