Malicious PDF — malware analysis report

Static analysis result for SHA-256 579ddd8b250f8701…

MALICIOUS

PDF

36.1 KB Created: 2021-07-01 10:09:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a07d8a95fed241ac8c8605412fb96a16 SHA-1: 8416bad9ccd4137dcee842471ac6cea26442643b SHA-256: 579ddd8b250f8701c69f5efc1e8f04dc04b2f904f7d0bd7956029a3f542359ae
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized links for game hacks and cheats. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful files. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-robux-hack-cheat-engine-6.2-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/roblox-hack-robux-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-free-giveaway-live_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-games-without-signing-in_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/r67-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-assassin-coin-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/obby-gives-you-free-robux-no-password-required-2021-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-test-server-free-obc_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/hack-para-tener-todas-las-trasformaciones-de-dbr-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-chromebook-exclusive-roblox-item_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.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_off000034d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D7 22408 bytes
SHA-256: 068d197255b0e4a840b00b47fae49c32925698f7d54b1ef8e26ed5ba3c21eba1
font_01_sfnt_off000066e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E1 19544 bytes
SHA-256: 44b37e6b6ae8074576bb7a4c1f4f2d86008eae1220dece383e577ad47e1491b9

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