Malicious PDF — malware analysis report

Static analysis result for SHA-256 885179a8a2ac8b8c…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 05:27:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 57d7e31c3131643562a02488447cf251 SHA-1: 8a855c75e60fb8c408dbf3bbbe1ab261512d6ace SHA-256: 885179a8a2ac8b8c5e6c96546f33f36dcf00c6638797a77589df5805a83cfbdc
142 Risk Score

Malware Insights

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

This PDF document contains numerous links disguised as game hacks and generators for popular games like Robux and Minecraft. The primary link, http://netcdn.co/app/431946152/growbux-get-free-robux-game-hack, redirects to a site likely hosting malware or engaging in phishing. The PDF's structure and content strongly suggest a lure to trick users into visiting malicious websites, aligning with a spearphishing attachment tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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/growbux-get-free-robux-game-hack PDF link annotation
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-shirts-on-roblox-without-bc_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-robux-scams-malware-wikia_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/mocap-dancing-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/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
font_00_sfnt_off00003223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3223 22356 bytes
SHA-256: ca1b5d2bbf77880edb77d71ca7d5338dfca3feb8978d2b06a3a4766e3807e19c
font_01_sfnt_off000063c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 18984 bytes
SHA-256: bb1d54f7cd41d4eb6894213362364ea5520db8dc923c013f612c5d32cba869e4

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