Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5070de0862c45e…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 11:42:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d017c917571a37101cada1471019be0e SHA-1: 7f61539b95f4e1632fecd4a697c9a898ed87cd60 SHA-256: eb5070de0862c45eea54fe3fca8302f332058245b0d4dad2e37b7b82762c4b34
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one that redirects to a "free generator / game hack" lure, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/479516143/play-full-version-of-minecraft-for-free-no-download-game-hack PDF link annotation
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coins-master_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.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
stream_004_off000057e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x57E2 23932 bytes
SHA-256: 24c5dc565b10fcea6c2905b5dfffa91ef3db1e0d1ad66e516d417ce6007e78ee
font_01_sfnt_off00008e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1A 18900 bytes
SHA-256: 72a4985a0f1854ed26b55ec1f9c271b843743081401250fa5f99a0b23226d3ed

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