Malicious PDF — malware analysis report

Static analysis result for SHA-256 340b1c8a75314a52…

MALICIOUS

PDF

40.8 KB Created: 2020-03-25 04:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e47e2652c7fd3405470c4429534e6ad0 SHA-1: dc2b4fd0021d484d747c5504374528db2fc40890 SHA-256: 340b1c8a75314a524724b477f06e41ce3b7f81a11e0e307163a6ea20e6d35fb8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified as a PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded links likely serve to direct users to malicious websites or to manipulate search engine results.

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://laurikopo.com/uploads/1/3/0/9/130969172/130969172.html#tecnica+de+cateter+venoso+central+yugular+pdf
    • http://dmrcvss.co.uk/uploads/1/3/0/7/130776319/bfaafa27.pdf
    • http://candcholidayrentalsltd.com/uploads/1/3/0/7/130739885/70aedf15f.pdf
    • http://uciwpthinkbig.com/uploads/1/3/0/7/130740429/sovurek_jureso_vurokabi_bigozit.pdf
    • http://itsfreshtogo.com/uploads/1/3/0/8/130813851/8d01bee04a492.pdf
    • http://plicharities.org/uploads/1/3/0/2/130273762/wepogazul.pdf
    • http://mygptravel.com/uploads/1/3/0/7/130775584/b5f1d7.pdf
    • http://hotelindustrymagazine.com/uploads/1/3/0/8/130874395/ribafog.pdf
    • http://dissostich.us/uploads/1/3/0/6/130604086/2111887.pdf
    • http://www.seattleinternretreat.com/uploads/1/3/0/8/130874566/336344.pdf
    • http://mecanicienindustriel.com/uploads/1/3/0/4/130488839/a39567c3e.pdf
    • http://www.lhmemorialfund.com/uploads/1/3/0/6/130603745/5634628.pdf
    • http://medicalcbdlabs.com/uploads/1/3/0/6/130604527/1861327.pdf
    • http://liadosangennarofesta.com/uploads/1/3/0/5/130590205/350ab.pdf
    • http://carpets.casadedios.us/uploads/1/3/0/6/130640019/jusekiwifig_jebufuxil.pdf
    • http://chante-ishta.com/uploads/1/3/0/7/130776100/zudisigetupi-rerefuripadas-mupijolure-luvupofe.pdf
    • http://bellevuebraintrust.org/uploads/1/3/0/2/130272458/89cd8a73d8d88e6.pdf
    • http://nirvanastorage.net/uploads/1/3/0/6/130621717/76c7d9cb0b2c9f0.pdf
    • http://salescolor.nl/uploads/1/3/0/5/130545957/wenozezudunanona.pdf
    • http://bosssales.com/uploads/1/3/0/2/130271082/698026.pdf
    • http://melissapellizzari.com/uploads/1/3/0/9/130969966/tozepasanedal.pdf
    • http://yambigo.org/uploads/1/3/0/8/130814390/8cb3e8b75d07694.pdf
    • http://www.mobilemassagemontgomery.com/uploads/1/3/0/6/130639310/jozujawojeximat_tileligiruj.pdf
    • http://berean9-10english.com/uploads/1/3/0/6/130604548/1560576.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_off000073e9.bin
414f78820a7266663339f5e6d8ac6b92ac4e2f3f7f4bdc7cd203f5da5d8354d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E9 8932 bytes

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