Malicious PDF — malware analysis report

Static analysis result for SHA-256 def83f61bc6bd2dc…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 16:51:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a0f09d334cabb85bbae008ab28627975 SHA-1: ab7e94f6cf571248faa3a8b112f6cc45312b2a3b SHA-256: def83f61bc6bd2dc700d38b223e5f74523688d7b09da90d8204987bfcf387a99
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to trick users into visiting a site that likely hosts malware or further phishing content. No scripts were extracted, but the PDF structure and embedded URI are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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 http://netcdn.tw/app/431946152/roblox40com-robux-game-hack PDF link annotation
    • http://smpn1sda.sch.id/slims/repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-a-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/change-roblox-username-for-free-android_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-cheap-hack-buy_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/oh-no-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-cheat-robux-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-alts-for-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/conscle-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-gift-card-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/builda-a-boat-for-treasure-roblox-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/gilded-triad-crown-roblox-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-free-coins-in-mcpe-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
font_00_sfnt_off00002eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAE 21860 bytes
SHA-256: f70ca475602a57ad8b4af9b15dd51eee5042b56cb503f14d63a561bbe954d531
font_01_sfnt_off00005f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 19120 bytes
SHA-256: 1da81d55382e1c31fd4c6d9ed48754b7b1fca039527ac4466b5c20815f286d1d

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