Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed570d0d46aeadd7…

MALICIOUS

PDF

45.2 KB Created: 2021-06-09 05:09:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1d2ad63132e5cc339ceb369826876061 SHA-1: 6bd04defcaf297e92533f253044f2ef968c15cd6 SHA-256: ed570d0d46aeadd70b2d518d109432d50c860b6644be4a089f4a2375332927b9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors and SEO link farms, masquerading as free game generators or hacks. The primary malicious URL identified is https://netcdn.tw/app/431946152/paginas-roblox-free-robuxx-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/paginas-roblox-free-robuxx-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-hack-roblox-jailbreak-go-through-walls_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/download-roblox-for-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-works-no-survey_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/descargar-hack-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/crystal-hack-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005102.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5102 25516 bytes
SHA-256: 664cf2cc5844537022c0118ac9fca76e32851d29b08f1e5d5ffa27a608ac9550
font_01_sfnt_off00008c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C54 18880 bytes
SHA-256: d3f034dd123b5c4d4c2f4511b8624adea0903823abf8234314ed4fc8c22bff9c

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