Malicious PDF — malware analysis report

Static analysis result for SHA-256 557a688dd5eb6cd4…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 18:30:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 22efee9b3bce83dc881c10fcfaf3cb2a SHA-1: 001650fa64182142b5616507d9d64a5a8b43833b SHA-256: 557a688dd5eb6cd4615b514dca3e8ca2d6876911893d2fd4a7d76f3b01f8c8e7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/479516143/minecraft-java-edition-download-free-game-hack PDF link annotation
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/christmas-tree-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/roblox-but_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-robux-no-generator_GM431946152.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_off00003209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3209 22136 bytes
SHA-256: 841ed486f94730e427508f244826845a0c9549fac01a43e96b545693511743cf
font_01_sfnt_off00006299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 18856 bytes
SHA-256: 5b5dffd1801a7646d4903e54774a45840ad7d6456fb30c9e0aec91f174fc5586

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