Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1ac4aa29cea64d…

MALICIOUS

PDF

49.7 KB Created: 2021-05-16 23:34:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 29e1e16da7cd13da89920059f558d88d SHA-1: cd5803909ca3b2248ad5ea399d8aa994bc524511 SHA-256: cd1ac4aa29cea64deb12fe59589f1f2e935ecf2e3ce92f9ff157a6bd084ed0f3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and potentially malicious content. The document body, though heavily obfuscated, contains references to 'Rubux' and 'game hack', suggesting a lure for users seeking in-game currency or cheats. The presence of external URIs and a link farm heuristic indicates an attempt to redirect users to external sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/431946152/www-rubux-game-hack PDF link annotation
    • http://goldwing-shop.ru/images/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/strucid-aimbot_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/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://goldwing-shop.ru/images/real-free-robux-generator_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/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aa5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA5 25132 bytes
SHA-256: cac2b61833d8270938d366796103c4a823154ce8dd4185693ec69cda308f66c3
font_01_sfnt_off00008491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8491 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00008e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2C 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_03_sfnt_off0000a00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA00F 18068 bytes
SHA-256: fc38c016acc36c76b7a0729eb2c8d98b0fd59e97c8a3cfb4a698daadf76a8d1e

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