Malicious PDF — malware analysis report

Static analysis result for SHA-256 82499843585e5beb…

MALICIOUS

PDF

42.9 KB Created: 2021-05-12 21:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4ebe3ddfe24a1dfedddfe5a77a237056 SHA-1: b95ef4c9bdf3c81b11dda6cafb7a9d33b7c2715c SHA-256: 82499843585e5beb72fd1c686ef303bb7c526008703fec25b23ed2058860445c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors and game-related lures, such as 'free generator / game hack'. The document body and embedded URLs suggest a phishing attempt to trick users into downloading further malicious content or visiting compromised sites. The primary attack vector appears to be social engineering via a malicious attachment, leading to further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-assassin-game-hack In PDF document text
    • http://atmos-service.com/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a62.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A62 25808 bytes
SHA-256: f0be04af063f6776ac8d497bec69b89c21ef677cd9c3500f87c1e27024229808
font_01_sfnt_off000085ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EF 18132 bytes
SHA-256: 9aaa8df6f0ee392d073232f21e4c453f2f39b896f85937247654776b23119032

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