Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed61f4b406f77001…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 18:14:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 233f41ef3a749a58009f94b28c663609 SHA-1: 0b58b9852e38311af5d42730e124565a03e8be86 SHA-256: ed61f4b406f770016200e66d51bc195dfc40ed4772adcf1cfb146fd0101c66d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/but-link-says-free-robux-game-hack. This redirector is disguised as a 'free generator / game hack' lure, aiming to trick users into clicking. The document's content and embedded URLs suggest a phishing or social engineering attempt to lead users to potentially malicious websites.

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/but-link-says-free-robux-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/dayz-roblox-cheats-codes_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/cheating-asimo-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/october-2021-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-unlimited-money-in-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-no-bc_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/get-free-robux-now-no-human-verification_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hacks-for-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-download-apps_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/kuso-icu-roblox-hack_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
font_00_sfnt_off0000319b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319B 22800 bytes
SHA-256: 192cd33f7b4f5563542b625b7af539e317e1a0a9186a8b91430dc4a2d66b0892
font_01_sfnt_off00006476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 19292 bytes
SHA-256: 85e89077dd7519a4f4a641b8f2e0513bf80b3f407ef760b68c8b6f40ad995aa9

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