Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e421c5705753a1…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 07:26:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b572b874fbf68deb45bf92dd66b20016 SHA-1: 8ecd9e0d4b9073c08fe70deec4eca51bb26ec553 SHA-256: 50e421c5705753a1e7257f407f9379c5b604dea12a5cda30aa2e995425afbc74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as a lure for free game items and hacks. The document body explicitly mentions 'Free Roblox Clothes And Hair' and includes the malicious URL, indicating a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the lure strongly suggest a phishing campaign.

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/431946152/free-roblox-clothes-and-hair-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-tower-of-hell-hack-script_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/hack-roblox-net-one-handynummer_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-tiktok-followers-com_GM835599320.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-promo-codes-2021-october_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/tiktok-minecraft-hacks_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
font_00_sfnt_off00002f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6A 22028 bytes
SHA-256: d1e44deff69d90c9138e4f55d1236decf30ad6cf1ba7a84f3406b7657a1653a5
font_01_sfnt_off00006051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6051 19216 bytes
SHA-256: 7e2ba9ac97b995c4042039eded303f1a68f0b8ee29cce668a26419cd3902f156

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