Malicious PDF — malware analysis report

Static analysis result for SHA-256 395985570bb17321…

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 21:44:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f55086942bc020d6d8e3361c25a6695b SHA-1: 49a17bf70254251d04b8296761a999df375f6a76 SHA-256: 395985570bb1732131794f8deb7a9d72ef900d565b70f46564795d76f5ae0270
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-generator-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely as a precursor to further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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/free-generator-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-cheat-client-juillet-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-hcbb-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-money-hack-adopt-me_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-how-to-get-free-clothes-on-ipad_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-pants-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-spins-link-today-ios_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_off000033e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E3 22056 bytes
SHA-256: 5a67ff5c89dd3ac8fb00be5c7931b220f9678845002f3ea297b19c7367fa02ba
font_01_sfnt_off000064a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A7 18312 bytes
SHA-256: 187d6f615b557117bfff21cb1984978064311fea2e79d0c86d9b4be90d996e92

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