Malicious PDF — malware analysis report

Static analysis result for SHA-256 4246200d63a04230…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 09:06:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ed55e19db0a3696e5b08ef38180051f4 SHA-1: e5cac26e17b0b9fc6681684fbb92cb685b1e387b SHA-256: 4246200d63a04230d8777d70f7669570f1d81711d1a7703aa04c6cfefd5e48b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary redirector URL is https://netcdn.xyz/app/431946152/how-to-get-100-robux-for-free-game-hack. The document body and embedded URLs reinforce this lure by mentioning "Robux" and "game hacks", indicating a phishing or scam attempt.

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/how-to-get-100-robux-for-free-game-hack In PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/minecraft-dungeons-free_GM479516143.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_off000048f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F5 25088 bytes
SHA-256: 3b639da1b4265d5c9a71edc0c4c0aa6d6d07aa3dcfa047a005937863f0dc20dc
font_01_sfnt_off0000835f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835F 18560 bytes
SHA-256: ebe7febd7c9c87dba90e20cfb7f210acfd9bc8f8383e28ef55b41a5f3c0fccc9

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