Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba055d41b81f7438…

MALICIOUS

PDF

45.0 KB Created: 2021-06-13 20:12:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fe73f80b5f41316df0a1d289ca60176f SHA-1: c1c47a1f984baa6ab667e9da155b6925a659c7a8 SHA-256: ba055d41b81f7438ff6c4ceb866fac7f04128a988c952b2210820401e9fcd4fe
182 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to appear as 'free generators' or 'game hacks' for popular games like Roblox and Minecraft. The primary malicious link, http://netcdn.co/app/431946152/roblox-pet-simulator-how-to-get-a-free-rainbow-dominus-game-hack, is associated with brand impersonation, likely leading to credential phishing or malware. The PDF also functions as a link farm, directing users to a large number of similar lure documents hosted on katalog.smkn1glagah.sch.id.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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/roblox-pet-simulator-how-to-get-a-free-rainbow-dominus-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/roblox-pet-simulator-how-to-get-a-free-rainbow-dominus-game-hack PDF link annotation
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/mc-hacks_GM479516143.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
stream_002_off00004a82.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A82 28200 bytes
SHA-256: c4ee25e9eba70ca8563b78ec577deeb03dfdf7a9353981ae65258e5a014f554f
font_01_sfnt_off00008b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2A 19284 bytes
SHA-256: fc6ea7f6499abc971e9df0e74bf4be589ad3ae94ae03c0d17325abbbef23ac28

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