Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e78cb3681f2dc62…

MALICIOUS

PDF

33.8 KB Created: 2021-06-28 06:39:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7c57671ad582033f4149ae679e2248b8 SHA-1: bb8c8cfcf41d2951e1c35624df3d97b0bee798dd SHA-256: 2e78cb3681f2dc6206df685590d46c3f90b18ba81cba3f7f2ace3bff0b6cb2c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The primary lure URL is http://netcdn.co/app/431946152/free-green-pants-roblox-game-hack, which is designed to trick users into clicking through to potentially malicious sites. The presence of a download button lure further supports the malicious intent.

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/free-green-pants-roblox-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-no-human-verification-for-kids_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-get-robux-free-2021-thai_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-free-redeem-cards-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/dbor-roblox-level-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/best-free-catalog-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/hackear-tarjeta-virtual-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-roblox-item-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/hacks-for-camping-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-european_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-granny-roblox_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_off00002cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD5 22640 bytes
SHA-256: 99df2737dcaf84eeefba285f05a8a0337c09288a33532d517c40a797a5c310cd
font_01_sfnt_off00005f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 18908 bytes
SHA-256: 25c7bd68fde714aa0f9762a22ff90a4109d29ae96b7cfc2cd5d048f1d12d097f