Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f9dee5fbf39c0a…

MALICIOUS

PDF

35.4 KB Created: 2021-05-22 18:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4a32b95b4611c509a7905b10ce11529b SHA-1: 551dff10b462cb7601d1043d9e89f0f536728a90 SHA-256: b0f9dee5fbf39c0aa9008527b1d01f8455a9e854c034ea5902804485f085df00
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 0.9648

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/479516143/free-minecraft-server-maker-game-hack PDF link annotation
    • http://e-onlinearchiv.de/images/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/pubg-uc-earning-app-2021_GM1330123889.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://code.giftcards.comIn 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_002_off0000322e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x322E 24676 bytes
SHA-256: 1497a5f0bad211ba420fbfa2aaa97a4cd9470ccbd7338eff0cf8df5bedfc5df2
font_01_sfnt_off00006a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4D 17852 bytes
SHA-256: a2113846211f941d41962086a33418b46c13efddcea93467eebdb757cad7d920

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