Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38361fc77f08697…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 08:06:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7939b3e723a19d38f6c0a52408053226 SHA-1: 8092948c5f720f167fe203b5d1e038abd7cf68ea SHA-256: e38361fc77f086978257d21524bb2ce744e99babc4bc81e2cb397d355de4c385
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9864

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/how-to-get-minecraft-for-free-ios-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pubg-uc-voucher_GM1330123889.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pubg-uc-olx_GM1330123889.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-mast-hacks_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_004_off000055ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55FF 25304 bytes
SHA-256: 11b71dc4cec5cdc49d4b343cbdb984eafe6cdf3fb857555121ffac4e6ac28768
font_01_sfnt_off0000901d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901D 17872 bytes
SHA-256: f310131035db742f338f230ab2c5697c5d59cc25d8943e3e3339342bb09010ba

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