Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cd092ab705ad29…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 07:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 89f55374168384ea19ea2a71eb4de9f0 SHA-1: a92256cdc192a473c0bea1f4afb1ac9f465183a9 SHA-256: b1cd092ab705ad29f516d5d4ba2ff3d85bc31124ed23961318327f0c28625e16
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 0.9865

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.online/app/479516143/minecraft-game-hack PDF link annotation
    • http://librarystkippgribl.com//repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/pokemon-go-free-coins-no-human-verification_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/pubg-uc-hack-online_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hack-moccap-dancing-points-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-roblox-acc_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_off000051ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EC 24584 bytes
SHA-256: d686d24eb9fe9f02a49ac7b85f88dadd5a7668cf42cf199e7c6231bd1c3f8577
font_01_sfnt_off00008991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8991 17568 bytes
SHA-256: ce96ee2cb1800a95c911c77dfe81c9a72a479049c6676c05affe2ae793ebac2d

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