Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0f63f07c013c01…

MALICIOUS

PDF

44.5 KB Created: 2021-05-13 01:09:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 164ca030182dfcf884daed067160ed96 SHA-1: e566a621caa0a1f572828d062b4ba50c38d29b9a SHA-256: ba0f63f07c013c01bcbea8ea8327e7cfd2b33675af3a62163b1b34c83b92f6bd
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/406889139/coin-master-get-free-cards-game-hack PDF link annotation
    • http://italianconnectionsleaford.co.uk/images/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/whats-robux_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://italianconnectionsleaford.co.uk/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F6 25296 bytes
SHA-256: 301c7a88031cd1c03bdddc5063bb0c1a75fb9092caca859d9fc73cca45c48a24
font_01_sfnt_off000082ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AE 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C60 17884 bytes
SHA-256: 5b281f9ab4f938cb23f4159929956e1cae7172efdead6ba15b04f3aeaf5d2e05

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