Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54cad6f904519e7…

MALICIOUS

PDF

32.7 KB Created: 2021-07-02 06:43:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 602080629fefa9e7ab17ff05e8d0af65 SHA-1: c7de2448aef2777cdd81c6efdda59a519308f7cf SHA-256: e54cad6f904519e79284b7c3befb38cb93fe4c2dc8eaecf40609c6b7cc5c1e02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that lead to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/are-free-robux-real-game-hack. The document body and heuristics indicate a lure for free game currency or hacks, likely to trick users into downloading further malware or visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/are-free-robux-real-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/clothing-groups-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/pokemon-go-free-pokecoins_GM1094591345.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-gift-cars-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/como-descargarse-hacks-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/cheat-codes-for-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-100-robuxs_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-robux-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-gui-mac_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/arsenal-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-2021-easy-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/como-hackear-roblox-para-tener-robux-gratis_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_off00002d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D85 21052 bytes
SHA-256: 062cb5c538388140a4627e05a2fe690a506e534ab536fd5831fbae38bde9e925
font_01_sfnt_off00005b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 18788 bytes
SHA-256: 3d03256a3c6608dcc3f7d4ebd87c67c0f3536b862ebfabca8017edbe89f5446f

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