Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1844cabe1a22286…

MALICIOUS

PDF

45.9 KB Created: 2021-05-12 14:47:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1501bb373d2cd539396d318bf4e163db SHA-1: 99e5fbbf6436fc936cbc26d998f8b2a412296970 SHA-256: a1844cabe1a2228692f468c0bd2f67b95cc58431e173d7ef4db4d02d284c31aa
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 game hacks or generators, impersonating brands like Amazon to trick users into clicking. The primary malicious URL identified is https://netcdn.xyz/app/479516143/how-to-play-minecraft-with-friends-for-free-game-hack, which likely leads to a credential phishing or malware download site. The PDF structure and embedded links suggest a link farm tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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: https://netcdn.xyz/app/479516143/how-to-play-minecraft-with-friends-for-free-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 https://netcdn.xyz/app/479516143/how-to-play-minecraft-with-friends-for-free-game-hack PDF link annotation
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.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_003_off00004d3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D3D 24728 bytes
SHA-256: f60e8ed3661fd852cfd353955afdbe8fabb362ce530872bf89adcb9f874649f4
font_01_sfnt_off000085b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B0 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9A 18820 bytes
SHA-256: 929f662ac2eae5fd14fa3d9c39139152715d90a6a2f974c19280ca038199c6c7

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