Malicious PDF — malware analysis report

Static analysis result for SHA-256 59eb95fae53cb71d…

MALICIOUS

PDF

42.8 KB Created: 2021-06-03 11:19:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e0476a580d7fe044cb42a5d6606259c9 SHA-1: 8832844a3a65da107e9cd3f32105a2c2e3aeb2a8 SHA-256: 59eb95fae53cb71d1a0c7d7c6b10c46d36d037eebc9430372baf178ca25264f2
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 0.9874

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/406889139/coin-master-daily-gifts-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hack-coin-master-1_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_off00004de5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE5 24256 bytes
SHA-256: 69ed3d06ef81ae998bb73e764062234ecda03422b7a8d93c4079297a82b4127d
font_01_sfnt_off00008549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8549 17968 bytes
SHA-256: 3c9bdffe1bb3a943d6f9365688f023e1626517f8d36d87a47424220bad3ebefc

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