Malicious PDF — malware analysis report

Static analysis result for SHA-256 55df8ebb8eb197e8…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 15:01:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e329e53ef4f7a01292cac4c1e8b84557 SHA-1: f171bd18118f41c9fe4ead11567d7ac7b1016c34 SHA-256: 55df8ebb8eb197e8adaf22f1b6e0763f1e590abe4dd47ed6050dc165bf4153da
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains multiple links to malicious redirectors and IP-hosted files, masquerading as game hacks and free currency generators. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a high likelihood of malicious intent.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/latest-coin-master-free-spins-link-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-demon_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-spin-wheel_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/xonnek-robux-hack_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-today-no-human-verification_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-exploit-trial_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/is-tiktok-free-on-app-store_GM835599320.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-onroblox-and-pastebin_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-case-clicker-rap-hack_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-givaways_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/create-a-roblox-fighyer-free-online_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-transmitter-generator_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/spin-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off0000318b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 22448 bytes
SHA-256: c9b7a04b81317132798cf23ecd1aaf8bf37f1f95d4c703c1e0f6b0fc8463e007
font_01_sfnt_off00006389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6389 18344 bytes
SHA-256: 3cae56739e9b784a2de05b8f28e362f0279ba9f74e5710fec04e6342d7c99e07

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