Malicious PDF — malware analysis report

Static analysis result for SHA-256 898964619bd8a6a1…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 14:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 006e2755f7d1ceb705c8ed750e67db9d SHA-1: f91a0ee67a1e3ea7cb284f229279b231c73a8d05 SHA-256: 898964619bd8a6a19bbc553a0ea61ff51435dbc78e13e3e5e2038d04dd202c03
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into downloading "free generators" or "hacks" for popular games. The primary link redirects to malicious infrastructure, and the document itself is part of a link farm intended to improve search engine rankings for these lures. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely leveraging embedded JavaScript for redirection or further obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-robux-app-2021-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/nuevo-robux-hack-2021-funcionando-robux-gratis_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-cheats-hacks-and-codes_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/descargar-roblox-hack-robux-apk_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/cheat-engine-roblox-no-cooldown_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-vermillion-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-tiktok-likes-and-views_GM835599320.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-pizza-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-robux-without-paying_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_off00002e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E89 22976 bytes
SHA-256: e380066a5342d7859657e89956e6fd31125d6d95481b180070bcf0e87bfd870c
font_01_sfnt_off00006214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 19296 bytes
SHA-256: 2b5381b15c79e36d66fe09b00355aceabc7985a3bbfcc95a7c6d6095c4563c1b

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