Malicious PDF — malware analysis report

Static analysis result for SHA-256 858a1635ac39f0d2…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 09:49:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 448e90622bac311eaf82b8d28a1e4df4 SHA-1: 7497ca72487c192cf1351ba54d040c68a0c7368d SHA-256: 858a1635ac39f0d29e634b806d0790295c40654a073f169a98f5de81bb2b1713
142 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, masquerading as game hacks and free spins. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/no-scam-free-robux-game-hack PDF link annotation
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/best-coin-master-hack_GM406889139.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_004_off000051b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B7 24960 bytes
SHA-256: 8c38704a63b18f1da3f37efa2e2a1876359bf511b970dd97ba0ca4374299727f
font_01_sfnt_off00008b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B16 18500 bytes
SHA-256: 028f53d29b1a624cb68bae5e747b7c177b5cbf8f783d4c53e2642c12f49f399d

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