Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d697c9f900a48af…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 23:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7cc17027368dfbc5bdb0850f41c9ebda SHA-1: 18bb1316a7d6f691270f82e7166def15940f5916 SHA-256: 6d697c9f900a48afc7f1750e5242cba02046a770b9bd2c8e70c655ba85da01ef
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9865

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 https://netcdn.online/app/479516143/how-to-get-free-minecraft-windows-10-game-hack PDF link annotation
    • http://pustaka.fti.unand.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/como-hackear-roblox-con-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/giftrobux-com-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
stream_004_off000054ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54EC 24752 bytes
SHA-256: e52d0320f164cf6406084d344a4d5a7da61377fabc9fca39c29c13c70d16a134
font_01_sfnt_off00008bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAE 18524 bytes
SHA-256: fe6ad3553d22b3ca012de373afe6f753a0e0722d907aa022396de61a87271ffc

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