Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1c898acbd080ee…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 09:52:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b4f03ff54a66de83914815d45e6ea4fe SHA-1: 100ab5550cca4134af8aa6e1b8134f20b392718c SHA-256: 4b1c898acbd080eefba979f345c7737c60cd90bd8cf3983ce6acea53b3cc2e59
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-coin-link-game-hack PDF link annotation
    • http://www.travelone.ae/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-song-code-for-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-hack-unlimited-spins-apk_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_002_off00003373.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3373 23272 bytes
SHA-256: 4c9a13eb0ccad01d03cb205338378bfe0df881a19fa2edd81fec8c6e5588a9cb
font_01_sfnt_off00006814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6814 18004 bytes
SHA-256: 3f6727834a8c189fc1771e59949dce2e7845d1bfce995460b8a4f12ecc60858a

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