Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fff95afe4315c4…

MALICIOUS

PDF

46.4 KB Created: 2021-06-04 01:47:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1d4fb86e817a0c4ed065d8aa3524dba8 SHA-1: cd656a513b34a177dbc960af34a8cdfb4e96c498 SHA-256: 00fff95afe4315c44e6aff8bbd938a3c268e8b55c85fbf78bac968f8ab346a56
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 0.9832

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/406889139/coin-master-update-2021-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id//repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/pokemon-go-free-daily-box_GM1094591345.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-coin-app_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_off00005047.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5047 29116 bytes
SHA-256: 8fce26a91337b098a47b4d3993da1483425da9b48e94ca5e2e1110c9a26ba83f
font_01_sfnt_off000091fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91FB 18484 bytes
SHA-256: 2d3a472fcc561fc481c0da5969c31466f96864982e6dea6036c3c65c06d6ed28

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