Malicious PDF — malware analysis report

Static analysis result for SHA-256 3850d3a335f8ecfb…

MALICIOUS

PDF

42.1 KB Created: 2020-03-17 12:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 305d21542c6fd1f2214626d4118f9dcd SHA-1: 8b2bb9ca35ba6a1489fcea399de9ee643df85a2b SHA-256: 3850d3a335f8ecfb0665366da2f4e5fbcd04e5875afaa6d2a26a614b711e885f
94 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing a large number of external URLs pointing to various domains. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on these numerous domains. No scripts were extracted, and the document body is heavily obfuscated, making a precise determination of the ultimate payload difficult.

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://mainelectricalsolutions.ca/uploads/1/3/0/3/130379352/130379352.html#como+hacer+adoracion+al+santisimo+sacramento
    • http://mountaingalsbookkeeping.com/uploads/1/3/0/6/130620620/2324109.pdf
    • http://microblading-amsterdam.com/uploads/1/3/0/5/130539448/likenamuz-zemoma-jorib.pdf
    • http://blissfulmemories.net/uploads/1/3/0/7/130776249/xarexobijena_sivon_mejidoxu_minibujugaxo.pdf
    • http://vivabrasil.nl/uploads/1/3/0/5/130539227/putalotuvonimuk-mejogubilefe-wejon-likofetokiku.pdf
    • http://foxesdenproductions.com/uploads/1/3/0/9/130969306/1036500.pdf
    • http://wickedricks.com/uploads/1/3/0/6/130605034/dubizori-sorapaxokoxado.pdf
    • http://hostmaster.gulfislands.ca/uploads/1/3/0/6/130639051/5614d8.pdf
    • http://organikorganic.com/uploads/1/3/0/5/130540033/4817294.pdf
    • http://www.aerialstudios.net/uploads/1/3/0/8/130813650/dcb8cfb624e.pdf
    • http://auroraeclipse.net/uploads/1/3/0/5/130590658/85399b8fae1.pdf
    • http://istemeducation.net/uploads/1/3/0/8/130814100/buzidosurinuni.pdf
    • http://www.cookstownweddingstationery.co.uk/uploads/1/3/0/9/130969089/0eba11775b5.pdf
    • http://pmcg.rocks/uploads/1/3/0/2/130287239/2448782.pdf
    • http://www.thaireflexology.co.uk/uploads/1/3/0/7/130775605/kuranamun.pdf
    • http://hostmaster.futura-foundation.com/uploads/1/3/0/5/130541137/bibax.pdf
    • http://scottyvincent.net/uploads/1/3/0/3/130313403/fe844cf.pdf
    • http://learnenglishspellingrules.com/uploads/1/3/0/9/130969598/rajilaxizalumome.pdf
    • http://hankmidnightmusic.com/uploads/1/3/0/5/130540661/riloxonojen-liburomefofilu-pavokafuni-jaxivexasap.pdf
    • http://www.wandaquiltwithme.com/uploads/1/3/0/5/130546937/pusimuvulefige.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000785a.bin
e28e6dc1f8604d05b14f950bc267d78a419c1ae7df1cce7c29c6fd8d94a1c59b
pdf-font-stream PDF embedded font (sfnt) at offset 0x785A 9036 bytes