Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85c258625451cea…

MALICIOUS

PDF

36.7 KB Created: 2021-06-28 19:16:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 26fcb086d0ecd6a5418b1359f3e2ad94 SHA-1: 8405d059599559cf376a336071fb3db61be0b1f8 SHA-256: c85c258625451cea6649c91f8b581e53a77aff30220d4717d215bf4ce612c776
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. The embedded URL http://netcdn.co/app/431946152/roblox-robux-hack-no-survey-no-human-verification-game-hack is identified as a known malicious redirector. The document body also contains numerous links to other potentially malicious PDF files hosted on the same domain, suggesting a campaign distributing game-related cheats and hacks. No scripts were extracted from this sample.

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.co/app/431946152/roblox-robux-hack-no-survey-no-human-verification-game-hack In PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/buzz-youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/minecraft-116-free_GM479516143.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/pokemon-go-free-90-fps_GM1094591345.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/how-to-hack-someones-account-on-roblox-2021-february-2_GM431946152.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/how-to-get-free-hats-and-gear-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/roblox-flame-exploit-free_GM431946152.pdfIn PDF document text
    • https://www.indahkonveksi.com/ckfinder/userfiles/files/robux-for-free-real_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_off0000360e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x360E 22620 bytes
SHA-256: a5a281658850cfa60cd511f4622bff0a80e90d2f1e509c115472a711a25ccf77
font_01_sfnt_off0000686d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686D 19708 bytes
SHA-256: 35a2b2fe605aea47afc0424492f031892a6e6f25ce4b5dd1afbd068e780ecde5

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