Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c997f5dfc2c91b7…

MALICIOUS

PDF

40.1 KB Created: 2020-03-21 15:10:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e6ccd3e4986a916541b0393040575495 SHA-1: 53a1fc9d5ab92e7762059a3f110097dab6d7bc17 SHA-256: 1c997f5dfc2c91b7681ee1a4b31e00d6d7503796ffd24a9f74f10750844f9494
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, many of which point to other PDFs hosted on various domains. This pattern is indicative of a link farm or SEO abuse technique, likely intended to drive traffic or host malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload or further actions.

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://miracleinabucket.com/uploads/1/3/0/2/130271049/130271049.html#digital+marketing+agency+near+me
    • http://mgbbsewing.com/uploads/1/3/0/5/130590200/f8c6213ea18e67e.pdf
    • http://vandenbossracing.com/uploads/1/3/0/6/130604644/voloxuweweneni_dadivosuxipej_tizudaxafilewik_mejunow.pdf
    • http://bankruptdad.com/uploads/1/3/0/5/130543761/244081.pdf
    • http://isocare.org/uploads/1/3/0/5/130543552/6432714.pdf
    • http://medcapital.ca/uploads/1/3/1/0/131069950/roloxijanufavoxo.pdf
    • http://mymssp.info/uploads/1/3/0/7/130739198/jijidef.pdf
    • http://bioenergija.info/uploads/1/3/0/3/130379181/lufolunewidazop.pdf
    • http://missuniversevietnam2019.com/uploads/1/3/1/0/131070187/jejako.pdf
    • http://aktivmassageterapi.se/uploads/1/3/0/6/130604321/miwarexe.pdf
    • http://shyamsridhar.com/uploads/1/3/0/6/130605194/posunifo.pdf
    • http://www.hendrixproperties850.com/uploads/1/3/0/7/130738893/614261.pdf
    • http://hometownpetfoods.com/uploads/1/3/0/6/130639410/3705787.pdf
    • http://indiabygrace.com/uploads/1/3/0/6/130639155/fosizulotu_popeludokaka_wukato_pasefumosajugat.pdf
    • http://cpanel.excellart.com/uploads/1/3/0/4/130483616/nepipepuroxatal_buwajumetujaba_sabodenetezuzet_tuzibu.pdf
    • http://hostmaster.buymultifunnel.com/uploads/1/3/0/5/130539458/beworiverogus.pdf
    • http://www.dvcreationz.com/uploads/1/3/0/6/130604083/vubitesili.pdf
    • http://www.woodsidesweettreats.com/uploads/1/3/0/5/130588976/garejakawura_guvapiwune_pobutotofapaj.pdf
    • http://www.ldnrenovation.co.uk/uploads/1/3/1/1/131163949/1553423.pdf
    • http://www.poster.agron.com/uploads/1/3/0/6/130639291/tuguzemixotimu.pdf
    • http://accidentinjurylawtoronto.com/uploads/1/3/0/4/130476747/1032135.pdf
    • http://fjdtech.tv/uploads/1/3/0/8/130874110/nokezigexuwamepu.pdf
    • http://reversegiraffe.net/uploads/1/3/0/4/130478484/negeni_wuledodaru.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_off0000700d.bin
d1223dcfcaa587cb9cd2bdcb011a16343683c4bbd758f5284579fdf81b2221d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700D 8624 bytes

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