Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca692180af8f178…

MALICIOUS

PDF

32.8 KB Created: 2021-07-05 18:17:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a40b73aedf9776dd5d10bb5b37d89946 SHA-1: dfd13faf68db9e77e186281e0b6926423f52d8d2 SHA-256: bca692180af8f178a9c10e46da16909cf2bebc0fd6234a1ee81b7f434055a3b2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'coin-monster-game-hack'. This, combined with heuristics indicating a game hack redirect and a visual download button, strongly suggests a social engineering attack. The document's purpose is to trick the user into visiting a malicious URL, likely to download malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/coin-monster-game-hack PDF link annotation
    • http://autoskola-scp.com/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-poke-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hacking-lua-c-script_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-critical-strike-cheats_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/prestonplayz-hacked-my-roblox-account_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/robuxy-com-free-robux_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_off00002cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFD 22400 bytes
SHA-256: d30859f8aa6d9b32f52c34279c99b818012097e7155ff7a29be3c93b6d175976
font_01_sfnt_off00005ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 17836 bytes
SHA-256: ecea4e06c2319bfbde5a9eafaa104503e5acdd43c54713b47264e7f5b68a66df

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