Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee23035977b44a40…

MALICIOUS

PDF

33.3 KB Created: 2021-07-04 08:47:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d40596c2108de032e9eba1328ff4ac67 SHA-1: 175033e8fd7ab3c4675e9f6533c1d96b6138e98c SHA-256: ee23035977b44a40351b95df662ca3edce8ff453b6570129b0b002b28581bb68
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks like Roblox. The embedded URL http://netcdn.tw/app/431946152/arsenal-hacks-roblox-game-hack is identified as a malicious redirector. The document body and embedded URLs suggest a phishing attempt to trick users into downloading potentially unwanted or malicious software.

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/arsenal-hacks-roblox-game-hack In PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/real-robux-hacks_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robloxhacks_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-no-survey-or-verification-or-download_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-secret-forum-hack-v11_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-robux-in-2021_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_off00002ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF2 21708 bytes
SHA-256: c567b3d50b28f9fd158be64f8064f126f0cbd92a75b9d9fd051c7378253eb87c
font_01_sfnt_off00005e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E39 18656 bytes
SHA-256: b0cf4a5b3dc34776d33419059177a1d5fc686d1d5ff4f2ac23985deb94cbc6b7

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