Malicious PDF — malware analysis report

Static analysis result for SHA-256 445163c5281751f9…

MALICIOUS

PDF

33.2 KB Created: 2021-07-08 18:48:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ee3d810fb43402f42ac9d374b77b35e1 SHA-1: 699b032a0fa9e676566935bfdfc60b58620e6646 SHA-256: 445163c5281751f976e4dd5b1becb37d5a09bf453875b3f257ab6dbfb9f7ea8e
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into clicking on what appear to be game hack generators or free currency sites. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The document body and heuristics suggest a focus on 'Roblox' and 'Minecraft' related lures, likely to trick users into downloading further malware or providing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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/431946152/freerobuxhack-us-2021-game-hack In PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-hack-999999-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/theme-park-tycoon-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-command-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/featured-items-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/pastebin-roblox-robux-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-on-roblox-jailbreak-ipad_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hacks-para-roblox-descargar-gratis_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/gift-robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/claim-gg-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-life-ii-hacks_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-roblox-login-name-and-password_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_off00002ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEB 21264 bytes
SHA-256: 902df2eb20de8507e18a66dfdaeb0d5d1e126620dff2810b0b4d00a34708a079
font_01_sfnt_off00005b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B57 19452 bytes
SHA-256: 43b81a284332bbcce6e172d110dbc1a63e46633337d5d3ab3430c81f8a1ab5e6

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