Malicious PDF — malware analysis report

Static analysis result for SHA-256 4476cdee1b3ea904…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 20:13:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c2b35a01dc33515d31498f7214025d90 SHA-1: 9c07f777b98466760b287086bfab19b3f2fad4f4 SHA-256: 4476cdee1b3ea90477887005a6a8efc76dc0e2acf82a447d7e3e2302ffeba156
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures, such as 'master-coin-free-spin-daily-game-hack'. The document body and extracted URLs indicate a social engineering attempt to trick users into visiting these sites, likely for further malware delivery or phishing. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/master-coin-free-spin-daily-game-hack In PDF document text
    • http://aeridefense.com/image/data/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/trolling-with-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-is-gay_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/good-scripts-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-hack-roblox-games-nice-and-quickly_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/www-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/weight-champion-cheat-codee-on-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-cool-free-tshirts_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-games-on-roblox-that-work_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_002_off000033ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33FF 22528 bytes
SHA-256: 01ec993ea62a0bd8e80ccc72e327c14b6cac6bf01a4e5ba196350f6ef0cae06d
font_01_sfnt_off00006631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 18596 bytes
SHA-256: 115892fac058e21728dd73f14dd50efb9625691fb0bdc47d6e9343c2bb96a73b

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