Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb86ade917ecaae…

MALICIOUS

PDF

42.9 KB Created: 2021-05-12 06:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da0791e8872b1719ebbd6ce2667f486b SHA-1: 9e15a1b702e6be0b5ef39319a02d0529f08b8a0a SHA-256: efb86ade917ecaaebb84a3cf5165a8acece5b01b422b999b3365c297b76aa312
130 Risk Score

Malware Insights

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

The PDF document contains a lure related to "free generator / game hack" for Minecraft, impersonating Microsoft and directing users to a malicious URL. This suggests a credential phishing or malware distribution attempt. Although no scripts were extracted, the embedded links and heuristic firings strongly indicate a malicious intent to exploit user interest in free game-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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: https://netcdn.xyz/app/479516143/minecraft-free-ios-2021-game-hack.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.xyz/app/479516143/minecraft-free-ios-2021-game-hack PDF link annotation
    • http://lib.unar.ac.id/repository/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-spins-on-coin-master_GM406889139.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_003_off00004a9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9B 25968 bytes
SHA-256: d2c0529e3c41290ef845713849f6c6e84280ce9421621725b5c2669e3b9fdcd9
font_01_sfnt_off000085bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BC 18112 bytes
SHA-256: b55c1404a277e69c847ae3cf6ace6563469f03eb0031cfae1db94f462975a683

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