Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd455f4dec812ac1…

MALICIOUS

PDF

45.5 KB Created: 2020-03-11 09:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 67f6125b65703489f399290294e3e53f SHA-1: da89571d9023ca79fd11d60bf787e99ebd8f9f0c SHA-256: bd455f4dec812ac13c9c1fbaa385aed0569ed3058fc597aa830816a4acb6cf63
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious websites. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a mass of external links generated for SEO purposes. The document body contains garbled text and a reference to 'Marley cooling tower nc 8405', suggesting a potential lure, though the primary malicious activity appears to be the link farm.

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://www.saratogaad.com/uploads/1/3/0/7/130776314/130776314.html#marley+cooling+tower+nc+8405 PDF link annotation
    • http://laboisserolle-diffusion.com/uploads/1/3/0/6/130639272/kidegasusakikub-vuvebibaw-wavojebiwujusu-wobawav.pdfIn PDF document text
    • http://www.coloringtodecorate.com/uploads/1/3/0/3/130379435/6671443.pdfIn PDF document text
    • http://mx.joshuabenking.com/uploads/1/3/0/4/130483552/zububizezose.pdfIn PDF document text
    • http://think-twice.me/uploads/1/3/0/2/130273738/gevunuvotexak-pavenazufeket.pdfIn PDF document text
    • http://jlcigars.com/uploads/1/3/0/5/130543272/lepiveridinefeb-xoburok-tinogu.pdfIn PDF document text
    • http://mx.goodfightstudios.com/uploads/1/3/0/6/130639757/049f7099.pdfIn PDF document text
    • http://sunsteadsolar.com/uploads/1/3/0/4/130483178/dd3a0801e456.pdfIn PDF document text
    • http://smuphideltatheta.com/uploads/1/3/0/5/130550859/buronirisu.pdfIn PDF document text
    • http://tamasconstruction.com/uploads/1/3/0/4/130435658/funijozoxokadi_tipijefove.pdfIn PDF document text
    • http://islandinvestmentinc.com/uploads/1/3/0/6/130620820/bda405bc.pdfIn PDF document text
    • http://gianniyoung.com/uploads/1/3/0/3/130379164/loxevimokagiti.pdfIn PDF document text
    • http://nwsconstruction.info/uploads/1/3/0/4/130435571/nuvutaxituwesuko.pdfIn PDF document text
    • http://www.draumlistfactory.com/uploads/1/3/0/3/130312971/3968921.pdfIn PDF document text
    • http://managedservicessacramento.tech/uploads/1/3/0/8/130814209/supakefuva_loguvux.pdfIn PDF document text
    • http://coachterrytennis.com/uploads/1/3/0/5/130590508/9081163.pdfIn PDF document text
    • http://mateju.xyz/uploads/1/3/0/8/130873927/dozamopulerafezifos.pdfIn PDF document text
    • http://www.raeandchloe.com/uploads/1/3/0/3/130312974/xetosimeliwivijev.pdfIn PDF document text
    • http://autodiscover.chicagopcc.com/uploads/1/3/0/4/130483086/tufozuparikolupoxa.pdfIn PDF document text
    • http://www.gamergoodz.com/uploads/1/3/0/3/130379389/pivaf.pdfIn PDF document text
    • http://5phortiplex.com/uploads/1/3/0/2/130272342/wowekaw.pdfIn PDF document text
    • http://hostmaster.lonsdale-estate.co.uk/uploads/1/3/0/5/130590391/nirumumas-vufakeka-bosakivujarakas-riwol.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000878b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878B 8576 bytes
SHA-256: 567b8cf9ddf949cd445f1b6b243e3dc247662c31051bb5e4203da2fdbbf355be

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