Malicious PDF — malware analysis report

Static analysis result for SHA-256 56fd532fac73aeec…

MALICIOUS

PDF

34.9 KB Created: 2021-07-01 20:55:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ebf895b3342534d71aa74ab3fd6b6037 SHA-1: 8985b50972a0ac6e04def9031a5d44f64bfcfd8b SHA-256: 56fd532fac73aeecbd5c566acaefde2e2394188f0dc9891902d3b8c1fee82831
182 Risk Score

Malware Insights

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

The PDF document employs a lure of 'free game hacks' and 'credit cards' to entice users to click on malicious links. It contains a link farm of 28 SEO-optimized PDF documents, suggesting a coordinated effort to distribute further malicious content or phishing pages. The presence of a password-protected archive lure indicates an attempt to bypass security scanning by encrypting the payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-real-credit-card-for-roblox-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-wings-of-liberty-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/i-got-hacked-and-cant-play-games-now-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-on-roblox-on-phone_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-collectables_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/generator-for-free-password-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-instant-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-into-your-roblox-account_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-people-hack-into-your-roblox-account_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/fun-flex-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000319d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319D 22268 bytes
SHA-256: 797cadd698860871cc5418730d62c5348df5b4a337ceb3a6c5d0f43609840c0e
font_01_sfnt_off00006334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6334 19048 bytes
SHA-256: 1bfa22b4a8a2587effb6355180f4051751087ae21562ef503c77c653d7c3b0c4

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