Malicious PDF — malware analysis report

Static analysis result for SHA-256 a939a5f4a9bf0440…

MALICIOUS

PDF

42.3 KB Created: 2021-05-17 20:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ca60bd72dbad568ece25e04279839415 SHA-1: 1d67ec2cb4dfa38f7df0dad4af79138134c8caef SHA-256: a939a5f4a9bf04408d50cf8f973350d2fdcca8edd0e391c9b2339c0bd1949692
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 0.9971

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.xyz/app/406889139/how-to-get-gold-cards-on-coin-master-hack-game-hack PDF link annotation
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnparung.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
stream_003_off00004bce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCE 24388 bytes
SHA-256: 6077f2ea73afdd8c46a518a20c5c1c3643590f851c8ae8139ea2c3c1d686aba9
font_01_sfnt_off00008360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8360 18128 bytes
SHA-256: b0821ef7a42f22885c2f4dbe346b20fafab4ea9562761702b292e8a7c35fefc6

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