Malicious PDF — malware analysis report

Static analysis result for SHA-256 feaddd7c3f1e5fec…

MALICIOUS

PDF

36.0 KB Created: 2021-07-03 23:08:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1e65f045bfd317ca91af5d0256f19004 SHA-1: 8110d3c1a80aca065f401ec1cf9214da0863fd73 SHA-256: feaddd7c3f1e5fec7e44fe7137fe0b2e4cd459225fa370607c4ce224812af017
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/how-to-get-free-pet-food-in-coin-master-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/muffin-kombat-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/software-for-cheat-engin-66-to-not-make-roblox-carsh_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/video-roblox-promotionx-codes-for-free-raimbow-wings-of-imagination_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-100-real-no-fake-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/pubg-uc-generator-no-verification_GM1330123889.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-bux-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-jailbreak-free-vip-server-link-in-description_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-gift-card_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_off00003482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3482 23472 bytes
SHA-256: 9be864a3967e1b149eb7ead1008cc45278ec84d7488f90f0bfa2c10c3834e5a3
font_01_sfnt_off00006970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 18492 bytes
SHA-256: 3b8d0933b66d4a3ba90188940e5d7ed21cf944b8acae8725630a3c3be9b63f2c

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