Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f8a681ec47f0cf…

MALICIOUS

PDF

41.3 KB Created: 2021-05-13 00:31:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 87c821750d93675395a4a8c5b8da660b SHA-1: df85cb41dd1ad0d82b73d97d9fa84fe2b646383a SHA-256: 62f8a681ec47f0cf55a2290a505f78e6828c7638361e5aa6dc82505d441654da
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a malicious lure, likely designed to trick users into downloading unwanted software or malware. The presence of numerous embedded links to other PDF files, coupled with a direct link to a potential download, suggests a coordinated effort for SEO manipulation and user redirection. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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.xyz/app/479516143/minecraft-launcher-free-game-hack PDF link annotation
    • http://goldwing-shop.ru/images/freerubux_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://goldwing-shop.ru/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/does-roblox-premium-expire_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
stream_003_off00004985.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4985 24820 bytes
SHA-256: ec7df0eff3a1f5bf9c3f3272e65429739a8fc54a9a06cc3443f44aad80c8bd37
font_01_sfnt_off000080aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AA 17872 bytes
SHA-256: d837b145e961d25029e35f3a46fce907c35d402980f977a4958a38d6468d5501

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