Malicious PDF — malware analysis report

Static analysis result for SHA-256 e193cabd82eb6e3c…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 15:33:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b8ddd06f7c3da5d3b3ed0f5f6b70f99a SHA-1: 9773952cc024f8ad8857d941b0b34a239f202ad0 SHA-256: e193cabd82eb6e3ca3bee03336cce4a6dfb5d566b1a80fa729fa0a71d34ad75d
182 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites that promise game hacks and free in-game currency, a common lure for credential phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and 'SE_BRAND_CREDENTIAL_PHISH' suggests impersonation of brands like Microsoft. The primary malicious URL identified is http://netcdn.co/app/431946152/hacks-para-roblox-mad-city-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/hacks-para-roblox-mad-city-game-hack.
  • 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.co/app/431946152/hacks-para-roblox-mad-city-game-hack PDF link annotation
    • http://www.thecoffeebaron.co.za/images/adopt-me-roblox-building-hacks_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-hack-vehical-sim-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/lol-this-guy-tryed-to-hack-me-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/hack-portal-heroes-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-roblox-outfits_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_off00002e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E14 22508 bytes
SHA-256: 1553a8f6c3058fb5bf40e589e52e9ba99d09d10dc32c01bd2d4bca5d03afd020
font_01_sfnt_off00006092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6092 19396 bytes
SHA-256: 89dc41e8dec8bb9ebc409313a1b773d1c7c230fe5ae0848bc870977d6aa82469

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