Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d83fd7831c73209…

MALICIOUS

PDF

36.6 KB Created: 2021-06-28 02:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 16f635910164cc444330896dfe1876a8 SHA-1: 257ccbeab8e5937e88582ce884d4f5909ff07ab8 SHA-256: 8d83fd7831c732091a6eaeffef747074e8ee0ef6751fcb635250918353b835f6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'free Robux' or game hacks, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to trick users into visiting potentially harmful external resources.

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.co/app/431946152/free-robux-no-human-verification-no-hack-game-hack PDF link annotation
    • http://stansabbiatura.com/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/how-to-get-business-cat-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/master-game_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/free-robux-generator-hack-club_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/animation-roblox-free_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/adopt-me-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/area-27-hacks-roblox-yt_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/free-promotion-codes-roblox_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/roblox-hack-menu-2021_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/btools-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/roblox-download-free-computer_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-hack-uk_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
font_00_sfnt_off000033b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B7 23436 bytes
SHA-256: 29a238ce5bea71c092e2661bc2ec9ff8c5e80c6097ffcdde9b8aa69740da716f
font_01_sfnt_off000068d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D0 19504 bytes
SHA-256: b05f9306fa159a13af1e509fc49c9cc7e64755e89bcef49f6263982855da0ea4

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