Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8ac5494d476967…

MALICIOUS

PDF

33.4 KB Created: 2021-07-10 00:54:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 377f3804023d54cdbf9fba491f885e85 SHA-1: 88f2402de313d16547058a23931877bb6ed2d48c SHA-256: de8ac5494d476967bb472834729bb0b672b24f47e613ceed3c3c90215d9430fe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-hack-roblox-game-hack PDF link annotation
    • https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-designs-for-streamers-roblox_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-card-number-roblox_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-make-a-free-admin-game-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-have-infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/hacker-for-roblox-https-meganz-nfpdms5k-q8b-1b9y_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/glitch-free-items-roblox_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-free-accessories-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/adopt-me-roblox-money-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-roblox-synapse_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-free-robux-2021-no-hack_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-free-robux-generator_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_off00002d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D21 21984 bytes
SHA-256: 8d7ad76d38e22f12c9cfb1b4fa2e2767bfa34d1238b6f6478ea58f7ccb4f99a0
font_01_sfnt_off00005dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCC 18820 bytes
SHA-256: bc289db47467c627b75bad478044969f7c78c51a6f1934d82e9e517bf2978efd

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