Malicious PDF — malware analysis report

Static analysis result for SHA-256 2475c64071ec4be0…

MALICIOUS

PDF

44.4 KB Created: 2020-03-29 09:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d962e2581d09e3a69b4007c9dd04073e SHA-1: 38dac76ef2111f91adac433eca41a4806f636205 SHA-256: 2475c64071ec4be0b8d1c018a45d8d5e5f1a569b36b714f8061ac65040a48c31
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs hosted on similarly structured, likely compromised websites. This indicates a link farm or SEO poisoning tactic designed to lure users to potentially malicious content. The primary URL found in the document body is http://74-123-73-159.mgwnet.com/uploads/1/3/0/6/130604141/130604141.html#nombres+de+lineas+imaginarias+de+la+tierra, which is part of this network.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://74-123-73-159.mgwnet.com/uploads/1/3/0/6/130604141/130604141.html#nombres+de+lineas+imaginarias+de+la+tierra
    • http://lifewaylemoore.org/uploads/1/3/0/7/130775594/josezibed.pdf
    • http://mfatihekinci.net/uploads/1/3/1/1/131163691/2916773.pdf
    • http://insearchofmaud.com/uploads/1/3/0/2/130273915/xulubavoparexo_fazen.pdf
    • http://matthollisproductions.com/uploads/1/3/0/6/130604562/2576140f1.pdf
    • http://thesiemreaphotel.com/uploads/1/3/0/8/130814252/saxezemovuk.pdf
    • http://www.langtransport.no/uploads/1/3/0/6/130604255/9385932.pdf
    • http://stillwaterswellness.org/uploads/1/3/0/6/130604169/9445718.pdf
    • http://mail.adventurevillars.com/uploads/1/3/0/6/130604733/xilaburevij.pdf
    • http://www.stellartransportnemt.com/uploads/1/3/0/6/130603916/8354d01d8c1.pdf
    • http://geeksmind.com/uploads/1/3/0/2/130288549/15a6d3c.pdf
    • http://www.luxav.co.uk/uploads/1/3/0/2/130289587/xijijab.pdf
    • http://fami.lt/uploads/1/3/1/0/131071047/dozosolilaru.pdf
    • http://boost4families.com/uploads/1/3/0/3/130313390/nekogobupi_basisid_perirola.pdf
    • http://bulverdepregnancy.net/uploads/1/3/0/5/130550706/xudejojobulaw_perojopus.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e8.bin
e4d28da91c6e33cf73fd2b1da544bf39acc9c2e09e74b9ab17c72c84afcd2d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E8 9224 bytes
font_01_sfnt_off00008a19.bin
39001a6ac514d5a86b5d369c70d00329d36743665e15e08b871017b2f2c8de07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A19 16840 bytes

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