Malicious PDF — malware analysis report

Static analysis result for SHA-256 8210eafee805d32e…

MALICIOUS

PDF

49.5 KB Created: 2021-06-04 00:54:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5474f0f65b0812c6af03c2ca36eb8383 SHA-1: 3b3aac73dd7a3983cf019428ab33d14152368b9e SHA-256: 8210eafee805d32ede0d5fe4b70ce9ffb7be2b2ab56d9153ff64e4404bfd6b9e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are designed as link farms for game hacks and generators. The document body and heuristics indicate a lure to solicit sensitive information or redirect users to potentially malicious sites. The presence of multiple PDF links suggests a tactic to inflate search engine rankings or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.online/app/431946152/free-roblox-hack-us-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-5-robux-site_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005281.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5281 25208 bytes
SHA-256: c8063cd095d409031933ab18b103226822f87641129186c3385745760caa2115
font_01_sfnt_off00008c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C91 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off00009e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E02 18532 bytes
SHA-256: 0d34e375d8902d3efa285fd24fab142d003833d4205c7dc9a730d4d831678389

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