Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5dfc0b62aabaec…

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 22:59:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6afa4c4928b32dd2a89e8fffcd3f3744 SHA-1: 1595840922e3f85d6eaba0eca35d48b337605efd SHA-256: 1a5dfc0b62aabaec7081db7553b885379e8e97495ba02b30cc94b8cc9ebd607a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to what appears to be a scam related to "Roblox Robux Hack" and "game hacks". The heuristic firings indicate that the PDF links to known malicious redirector infrastructure, specifically the URL http://netcdn.co/app/431946152/roblox-robux-hack-com-game-hack. The document body also contains text and links that reinforce this lure, suggesting a phishing or scam attempt to trick users into visiting malicious sites.

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/roblox-robux-hack-com-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/who-to-hack-in-roblox-vampire-kingdom_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-one-piece-treasure-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-be_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-lag-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hacked-by-roblox-transpernt-backround_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-cheat-tool-download-pc_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/easy-robux-today-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-admin-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hack-the-bank_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-play-minecraft-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_off00003127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3127 22628 bytes
SHA-256: 3554f13a410918f7c537692d241cda1c7b9cd22eff81e7cbf68c189b5bfc5408
font_01_sfnt_off000063a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 19056 bytes
SHA-256: 1af7df76c6fe5aa8cc68ce51679a3828b009c88aab597320e817d48ebb4bcee4