Malicious PDF — malware analysis report

Static analysis result for SHA-256 6723c524ad16b213…

MALICIOUS

PDF

43.3 KB Created: 2021-05-15 00:47:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7c8f9f3e9c5aa2ea8bd142583ff4fc02 SHA-1: c86bf2076602c45d4ceaead862f1dd4b52a5678a SHA-256: 6723c524ad16b21311415e1fa92337ac463cb0b74b48f5496ef3ea55426aed18
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks. The 'SE_CLICKFIX' heuristic indicates the document instructs users to run commands, suggesting an attempt to bypass security measures and execute a payload. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a social engineering attack designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/free-minecraft-texture-packs-java-game-hack In PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/hack-a-game_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/john-doe-roblox-hacker_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_off00004bd0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD0 25416 bytes
SHA-256: 455fa19362d2432083b9091b705ddc5c95d22b1a4a5d73a6c8c1e76fbccdd5a5
font_01_sfnt_off00008658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8658 18520 bytes
SHA-256: 686fb3e1785c5679fc7febae081669fb57112988378368078b360718af0d5a6a

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