Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c5199e1bcf4d6c…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 13:46:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4a587369469b7ff65b4b96490b38f536 SHA-1: efd4eb2ea210e5ae2d22ed2f26a45abdf8f8c725 SHA-256: 50c5199e1bcf4d6c3bf6cf1b8be6a806a07adc31b04fc480a17a5da9632c6323
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure URL is http://netcdn.tw/app/431946152/hack-para-obtener-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit users through deceptive links, likely leading to further malware downloads or phishing attempts.

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/hack-para-obtener-robux-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-adopt-me-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-military-costume-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-skywars-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/go-to-gg-com-to-get-202120212021202120212021202100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-forum-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-ban_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.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_off00002efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFD 22692 bytes
SHA-256: ccff09dd5946ec14bfd597351f198059ff6c5f331310f5f3483d511ed198b28f
font_01_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 18980 bytes
SHA-256: 2c37171a150a2d14e4167a429db93bc04fd318d5912af8dc5788c47af11b4ebf

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