Malicious PDF — malware analysis report

Static analysis result for SHA-256 72801a3d23a10e0c…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 19:43:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8f25f930b807dba3d08caa9181a4555a SHA-1: 15bd933f7954290a8730df7b2a38c0d5eb059c11 SHA-256: 72801a3d23a10e0cd4a2c059295ed1a147dea117e9c592f691c7d44f8512c100
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free generators' and 'game hacks' for popular games like Roblox and Coin Master. It contains a large number of embedded URLs pointing to external PDFs, suggesting a link farm or SEO manipulation tactic. The primary URL, http://netcdn.co/app/431946152/how-to-change-the-name-of-free-morphs-on-roblox-game-hack, is presented as a direct download or information source, likely leading to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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/how-to-change-the-name-of-free-morphs-on-roblox-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-website_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-people-on-roblox-easy-exploit_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hack-client-no-virus_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hack-tool-for-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-computers-in-flee-the-facility-roblox_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_off0000302f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302F 22456 bytes
SHA-256: 4eb6925b9d4d7f7f05806c3b6a936dcc9ef6a02b68ade1bca17c82d393aa1367
font_01_sfnt_off00006250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6250 19612 bytes
SHA-256: 45adf5709232489f33745270d0708c723c9eb5917d45e069d805ca3ac8d9f5a9

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