Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e95e5ceae9a4e9c…

MALICIOUS

PDF

43.1 KB Created: 2020-03-24 16:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f9d52e056de148478642b66b89c24788 SHA-1: 8b11b374c9cd5cccc6301332967a39271df5bf73 SHA-256: 6e95e5ceae9a4e9c2ad2a5fed7526d23c7f83ceaacce520edc27dcbf9bf2a6b4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a Spanish phrase related to calculating the area of a rectangle, suggesting a potential lure. The primary function appears to be directing users to a vast network of linked PDF files across numerous domains, which is a common tactic for SEO manipulation or distributing malicious payloads.

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://thehnossaproject.com/uploads/1/3/0/5/130550827/130550827.html#formula+para+sacar+area+de+rectangulo
    • http://mail.lightemerging.com/uploads/1/3/0/6/130620576/eee01dcb.pdf
    • http://www.elizabethbrent.com/uploads/1/3/0/8/130873953/7853600.pdf
    • http://afghan2010.net/uploads/1/3/0/7/130739994/fubepofuzetegig_nivamajupebir.pdf
    • http://spencerkrum.org/uploads/1/3/0/5/130589227/wunefepot-pukovixikunis-nuwaz.pdf
    • http://christopherlayne.net/uploads/1/3/0/2/130274330/lixalorurilefivosona.pdf
    • http://hostmaster.annishealinggarden.com.au/uploads/1/3/0/5/130542770/vapidatafajid.pdf
    • http://beeboa.com/uploads/1/3/0/8/130814601/vuwagivapisa_tukodurawif_jakolizapeso.pdf
    • http://rcindustriesinc.com/uploads/1/3/0/6/130604452/d239a000413.pdf
    • http://ethanhunterphoto.com/uploads/1/3/0/5/130547024/d48b72ab8e89e9b.pdf
    • http://anthonybeastmode.com/uploads/1/3/0/2/130271041/4895352.pdf
    • http://moonmeart.com/uploads/1/3/0/2/130271145/6506721.pdf
    • http://www.experiencedigital.co.uk/uploads/1/3/0/7/130776617/lewoniraxeja.pdf
    • http://www.uptdmetalik.com/uploads/1/3/0/6/130603763/1736580.pdf
    • http://royalbridalghana.com/uploads/1/3/0/6/130604606/3825153.pdf
    • http://www.lebrecht.org/uploads/1/3/0/9/130969431/xavilarajep.pdf
    • http://5053lankershim.com/uploads/1/3/0/6/130603704/nonaxaduk-kubitigapev-subusu-nujikivo.pdf
    • http://myrole.finance/uploads/1/3/0/6/130639616/sitorovajafudefafawe.pdf
    • http://www.ladivinitydiaries.com/uploads/1/3/0/6/130621213/guvalapi_soguwa.pdf
    • http://bkcyouth.org/uploads/1/3/0/2/130287514/lanufegaledo.pdf
    • http://www.darkentityclothing.com.au/uploads/1/3/0/6/130621201/ea9b051.pdf
    • http://simplicityaccountingllc.com/uploads/1/3/0/3/130379380/xumobuzewigeze_wafaruleka.pdf
    • http://mennalaw.com/uploads/1/3/0/5/130545882/120086.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ab.bin
9a1683174328c66d1494299e1efd56dc0c271acec505f19aa01b08d9fa329a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AB 9060 bytes
font_01_sfnt_off00009188.bin
e65a7b97525877d9c6039ea36916f7d56a2fd0b832e321232b08a206218ea7f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9188 3708 bytes

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