Malicious PDF — malware analysis report

Static analysis result for SHA-256 767788ce1ec87689…

MALICIOUS

PDF

35.8 KB Created: 2021-07-07 20:45:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2328e5307a24b257b47843dd69785267 SHA-1: 4ea2cb99b88564715a9bdbe6793e115b0e21616e SHA-256: 767788ce1ec87689f79bb5d1e95ed02d0467ab2667d67ef794ff5a446f68ca47
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-email-rewards-link-game-hack PDF link annotation
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/how-to-get-a-free-dominus-hat-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/how-to-install-cheat-engine-for-roblox-no-winrar-required_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-hack-easy_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/cache-http-thebuxiancom-howtohackanyonesrobuxandstealit_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-france-roblox-flag_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-robux-no-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/roblox-drive-money-hack_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
stream_002_off00003450.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3450 23116 bytes
SHA-256: 812c2c3821f3337b17fd9e0358fb274ff36a09a9f58983c586d7baf4a6979745
font_01_sfnt_off00006822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 18676 bytes
SHA-256: d5ffef980cf25ab836b8eb0c54625faafd2d07e4decf07a72859dc95eb3454f0

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