Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da639fabc0579df…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 01:46:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b038ab343266e3ec4f2188f9d0e9889c SHA-1: 3339db0af0657fdd8cb4aeb76ab7f9ba49d67c3c SHA-256: 3da639fabc0579dfd8438ad75a001cef51315ceda637376c8df55db18af114d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to a redirector URL that promises free game hacks or generators, a common lure for malicious downloads. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/431946152/blox-land-free-robux-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/a-lot-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-mobile-cheat-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/is-tiktok-free-app_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-apk-hack-unlimited-robux-ultima-version_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/tiktok-free-svg_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-inspect-code-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pokemon-go-free-7-km-eggs_GM1094591345.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F00 22616 bytes
SHA-256: d2172c45a298c28be0f510df081e0b10f90ece5ef613fa18469773eb1cf69ad5
font_01_sfnt_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 18964 bytes
SHA-256: 3f12ef93e3f94e19068a8415642f40f3a4d95b4d38f37f1bdada02c05cec8b59

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