Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d31ef3b518f935…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 22:28:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 70052316a4522b719c4a2b849e69f609 SHA-1: 4daa7c25b0191229644a27e900413d12f0eda4ff SHA-256: e9d31ef3b518f935a20c623a522a8fff38428c5dbd1c8dd4bb5447b8a4f79afb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, designed to lure users into clicking on links related to game hacks and free currency. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful websites. No scripts were extracted from this sample, but the presence of malicious redirector links is a strong indicator of a phishing or scam 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/406889139/free-spin-coin-master-2021-link-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-wiki-free-items_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-island-royale-aimbot-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-no-surverys_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-no-verifaction-or-servey_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-granny-cheats_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-800-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-do-i-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-followers-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/best-roblox-skins-for-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3367 22984 bytes
SHA-256: 93b52f1aa6471772f7da6d768330718f84de3a562d8cd5095539add1d5785fca
font_01_sfnt_off00006727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6727 18748 bytes
SHA-256: 87551c50e6d609f3c8aae9c53aca7d1ad4c281dc834da60ceb94801aa8be48ba

Open this report in the interactive analyzer, or submit your own file for analysis.