Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d964b06c59a054…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 01:00:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2c6554a15dff4e30e26ba78859ef13e1 SHA-1: a4e4def11aafe6d87a3188fe93aac03aa3266451 SHA-256: 81d964b06c59a0540302869260937a914ae37cddcfe0f6e7841d5ff425bbcf2f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed to lure users into clicking on links promising free in-game currency or hacks. The primary lure is related to 'free Robux' and 'game hacks', which is a common social engineering tactic. The document's content and the high number of related URLs strongly suggest a phishing or scam attempt aimed at redirecting users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/how-to-get-free-robux-not-a-scam-game-hack PDF link annotation
    • http://gaec.cl/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/games-for-robux_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/easy-way-to-get-free-robux_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_003_off000048a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A2 25776 bytes
SHA-256: 5497ec7e104aa16d7d79a15c4c324b1b35adfc03c13a7b5571d1bf624956b563
font_01_sfnt_off00008502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8502 18768 bytes
SHA-256: 022361ef70d0601eb321de045a15355e0ef134abc2a3262f50e5e6000d82738d

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