Malicious PDF — malware analysis report

Static analysis result for SHA-256 27279acd18d8b2fc…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 17:32:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 12b15dab8d55564d67851300d3c6e47d SHA-1: 1411ea098074b4bbbab242a3e26d4cee4ec6b7f9 SHA-256: 27279acd18d8b2fce7cd6a20725dad1969c64472509be6854c8aef5e1b1a42a5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it's a lure for game hacks, specifically mentioning 'free Robux'. It embeds a URL that leads to a site offering such generators. The document body, though heavily obfuscated, contains references to 'Free Robux' and a URL that aligns with the heuristic findings. The primary attack vector is likely spearphishing, with the PDF acting as an attachment to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/funbloxxyz-free-robux-game-hack PDF link annotation
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-hack-april-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/minecraft-free-download_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
font_00_sfnt_off000051c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C7 26620 bytes
SHA-256: 4c33ba8dab4e141f8d1654d7b49f03f83c4c0f6beada4d7ba1325b5154267a84
font_01_sfnt_off00008dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAD 18352 bytes
SHA-256: c97bfd34326cab32b1d760988de7122f24b95a1078352bcef7a02fd0fb2a20c7

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