Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad938d18bf111a62…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 03:09:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ee64c8f239ea10f1782d37ff51689b5a SHA-1: 2e4e510bf4190d7cfd1faf1949d185d6cec9def3 SHA-256: ad938d18bf111a62182dad36da1abe4245bcb0a610d67ab873dd39ea2d0a9b9d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document employs social engineering tactics, presenting itself as a Minecraft hacked client to lure users into clicking on external links. The document contains a large number of SEO-optimized PDF links, many pointing to gaming-related "hacks" or "free items," suggesting a link farm designed to drive traffic to malicious or scam content. The ML classifier and the presence of a link farm strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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-windows-10-edition-hacked-client-game-hack
    • https://stroyzakazremont.ru/images/minecraft-name-tag-hacks_GM479516143.pdf
    • https://stroyzakazremont.ru/images/free-robux-generator-no-survey_GM431946152.pdf
    • https://stroyzakazremont.ru/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://stroyzakazremont.ru/images/how-to-hack-people-in-roblox_GM431946152.pdf
    • https://stroyzakazremont.ru/images/free-robux-survey_GM431946152.pdf
    • https://stroyzakazremont.ru/images/minecraft-free-edition_GM479516143.pdf
    • https://stroyzakazremont.ru/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://stroyzakazremont.ru/images/coin-master-daily-free-spin-app_GM406889139.pdf
    • https://stroyzakazremont.ru/images/coin-master-fan-page-free-spins_GM406889139.pdf
    • https://stroyzakazremont.ru/images/free-robux-without-doing-anything_GM431946152.pdf
    • https://stroyzakazremont.ru/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • https://stroyzakazremont.ru/images/free-robux-no-human-verification-generator_GM431946152.pdf
    • https://stroyzakazremont.ru/images/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • https://stroyzakazremont.ru/images/free-robux-no-verification-2021-ios_GM431946152.pdf
    • https://stroyzakazremont.ru/images/coin-master-free-spins-apk-2021_GM406889139.pdf
    • https://stroyzakazremont.ru/images/download-coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://stroyzakazremont.ru/images/get-free-robux-2021_GM431946152.pdf
    • https://stroyzakazremont.ru/images/free-coin-master-credit_GM406889139.pdf
    • https://stroyzakazremont.ru/images/minecraft-hacked-client_GM479516143.pdf
    • https://stroyzakazremont.ru/images/roblox-avatar-tester_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac9.bin
bbe42884b7561eca9fb0b94747aa2b2ac25d077d69ce1a8502d6ff5f15559c5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC9 24648 bytes
font_01_sfnt_off000082a5.bin
cd5cb1933d9fb22e17e8e809ea8161fcf394f5743921e04aafaba27e29739dbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A5 18768 bytes