Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dab0c9eb5b8c836…

MALICIOUS

PDF

41.5 KB Created: 2020-03-22 03:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f32a925416d4e5403266b7e454407412 SHA-1: 3cf7c3af763752368be2068ab730bd767c23c1c9 SHA-256: 6dab0c9eb5b8c8365aa67c10ebb8bd70c77c2201ab5af5fd2c0cd4c49423989e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded content, though partially garbled, includes URLs that are part of this link farm, suggesting a coordinated effort to direct users to potentially malicious or SEO-abused content.

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://reggieeaves.com/uploads/1/3/0/6/130621053/130621053.html#divisiones+de+3+fracciones+mixtas
    • http://fashionjewelry4u.com/uploads/1/3/0/6/130621727/sepifomazasup.pdf
    • http://www.corronfarmpreservationsociety.org/uploads/1/3/0/5/130551094/fujig_movofanefitamu_kaluxa.pdf
    • http://shutter-upphoto.com/uploads/1/3/0/7/130738650/c26af.pdf
    • http://webmail.lymphlight.com/uploads/1/3/0/7/130775854/tusugawibamorem-xegimizaw-fimaxonifanun.pdf
    • http://mta-sts.mail.rockymtbernedoodles.com/uploads/1/3/0/7/130739651/nolozenirode.pdf
    • http://shopofficeglam.com/uploads/1/3/0/5/130589097/9711222.pdf
    • http://bryhern.com/uploads/1/3/0/7/130738527/8950576.pdf
    • http://www.sandyburlesoneportfoliowfu.com/uploads/1/3/0/7/130740210/budezejefexataw.pdf
    • http://artasscience.org/uploads/1/3/0/2/130289577/829378.pdf
    • http://designresolution.net/uploads/1/3/0/2/130288534/bofibosakideloz_zitutorat_zovovokuwer.pdf
    • http://www.rachelkatewood.co.uk/uploads/1/3/0/3/130324050/jipulatasuputez-zubak-fejerizo-fipes.pdf
    • http://westbrookwillow.com/uploads/1/3/0/5/130540746/rujivosonavoman.pdf
    • http://artemisassessment.com/uploads/1/3/0/7/130776083/8043819.pdf
    • http://ideal-mep.com/uploads/1/3/0/5/130541846/gexajuzek.pdf
    • http://www.marilynmonroelegacy.com/uploads/1/3/0/6/130640163/9664961.pdf
    • http://regenerateyourauthenticnature.com/uploads/1/3/0/7/130775137/puzaz.pdf
    • http://truetrack.co.nz/uploads/1/3/0/8/130873982/zurogefedex.pdf
    • http://thestylusstall.com.au/uploads/1/3/0/3/130379226/sakuzifivakito.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_off000074e2.bin
7fc66cd72649cf3b143d5bc0cdf06c3ce1ee9604013bfb218bd473f2820080f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E2 9440 bytes

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