Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab66f90f303c0bee…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 14:43:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 323aae12621d1ddfdb2ce103f98109d5 SHA-1: 47a6df948fe8691f9e82755c30699f9605b8c174 SHA-256: ab66f90f303c0bee4c1a83dd24b4a96504aebecb2820eed9162853d6f2296e00
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/get-free-spins-coin-master-2021-game-hack PDF link annotation
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/cheat-engine-fonctionne-sur-quel-jeu-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/best-ways-to-make-robux-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/comment-hacker-le-jeux-roblox-sur-buku-no-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-can-i-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-coins-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/cool-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-no-inspect-or-waiting_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/real-robux-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/logiciel-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/rxfastml-generator-2021-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-in-ios_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-poke-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-build-a-boat-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-hack-commands-admin_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
font_00_sfnt_off00003147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3147 23528 bytes
SHA-256: 000eb5a1b262d4288944a3abe0677b2db6c3fafb2b10cf93308cd5355593b0ae
font_01_sfnt_off000065f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F4 18576 bytes
SHA-256: 47068641d4cd5afad495b2744cbb78709b2a1d88425159384b1e35df59296f67

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