Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1bc56b465b6ad90…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 15:47:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 43f6ac91c889de0c82c98e7d782fa678 SHA-1: 3062e1aca43f6c0e6ced3f83a275b93845b3d230 SHA-256: b1bc56b465b6ad90efd350f01cc63d12c50667d76e82916ee986e538adf4c0cf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized pages promising free Robux or Coin Master hacks. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests a phishing or malware distribution attempt. The document body itself contains a primary URL that appears to be a lure for downloading a game hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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-get-free-robux-easy-2021-pc-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/thomas-roblox-free-games_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/site-www-roblox-cheatus_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/executor-roblox-free-no-hack-promise_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-para-atravesar-paredes-en-roblox-2021-en-cualquier-juego_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-lua-c-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-de-roblox-traspasar-paredes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hcbb-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-apps-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/dragons-life-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-no-offers-no-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-generator-no-verification-on-teplet_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-unused-roblox-accountsno-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-dollhouse-hacks_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_off00003090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3090 22016 bytes
SHA-256: 1b24975cd8a5cf39fdf7906ffc84bea8851a54cc0e8f3b40b1582fc509b8dc45
font_01_sfnt_off00006155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 19536 bytes
SHA-256: 9da63d7686b1ba1067a6ef175c7d52e48c30ee82df6578f8e542c18e62c3de53

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