Malicious PDF — malware analysis report

Static analysis result for SHA-256 b074ac5ae446b848…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 05:51:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9f3fef930f673f33f5b309aed1f0e3cd SHA-1: abfa045439c0df1085417b3214843ddf570bb864 SHA-256: b074ac5ae446b8487a89c1347cd30e61715165459f5b49b728c1246495cd140f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links disguised as game hacks and free account generators, which redirect to malicious infrastructure. The document body and heuristics indicate a lure for users interested in game exploits, likely leading to malware download or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/script-for-cheat-engine-roblox-game-hack In PDF document text
    • http://www.jsvillas.com.tw/assets/files/rich-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/noclip-hack-roblox-jailbreak-may2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-hack-into-someones-roblox-account-vermillion_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/pokemon-go-free-roam_GM1094591345.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-robux-game-hack-com_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-do-i-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-hack-1-2021202100-roblox_GM431946152.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_off00002e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E28 22552 bytes
SHA-256: 78e2da6dfa78c23fef72a46ab9a67bd98a90ba710e57ef9b44d2b5d54492a881
font_01_sfnt_off00006095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 19216 bytes
SHA-256: ab1ad8b342663f52c0f7d7e33b8110f4d620667ea366491549d1c8da0c7cc9eb