Malicious PDF — malware analysis report

Static analysis result for SHA-256 5711bbd1ff696c80…

MALICIOUS

PDF

36.3 KB Created: 2020-05-17 05:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 78740765c751b49e8d2229a66cc6e90c SHA-1: 9b710f0105c74abf4f20b33de8c318a9d039904e SHA-256: 5711bbd1ff696c80be40101dbb02d39d1be480f5cfbfac08b223ff00845957af
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains text related to 'Mcgraw hill us history workbook answers' and numerous URLs, suggesting a lure to educational content that redirects to a network of suspicious domains. The primary attack pattern involves a link farm designed to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jfleischer.com/uploads/1/3/1/1/131163718/131163718.html#mcgraw+hill+us+history+workbook+answers PDF link annotation
    • http://christinecarson.org/uploads/1/3/0/3/130323417/0410f49e.pdfIn PDF document text
    • http://wildridecoaching.com/uploads/1/3/0/5/130588508/2913015.pdfIn PDF document text
    • http://bethadice.com/uploads/1/3/0/8/130873846/rekexegaz_zuras_tujuset.pdfIn PDF document text
    • http://wondercakesatlanta.com/uploads/1/3/0/4/130488547/2195455.pdfIn PDF document text
    • http://drisimportsl.com/uploads/1/3/1/3/131383717/nizuwituj.pdfIn PDF document text
    • http://coaptcontrol.com/uploads/1/3/0/4/130476351/8358661.pdfIn PDF document text
    • http://hemlockcanoe.us/uploads/1/3/0/7/130738620/gipasiripileseli.pdfIn PDF document text
    • http://cga-ct.com/uploads/1/3/0/4/130476045/9858670.pdfIn PDF document text
    • http://visionbystin.com/uploads/1/3/1/4/131407408/tuketagi.pdfIn PDF document text
    • http://learnaboutspreadsheets.com/uploads/1/3/1/4/131482992/2633002.pdfIn PDF document text
    • http://wld-history.com/uploads/1/3/0/4/130475966/jarixofovovixonukute.pdfIn PDF document text
    • http://yomanejoseguro.net/uploads/1/3/1/6/131606603/dc27e.pdfIn PDF document text
    • http://sassyssmoketique.com/uploads/1/3/0/6/130604564/8210181.pdfIn PDF document text
    • http://itsthehealth.com/uploads/1/3/0/9/130969115/5379408.pdfIn PDF document text
    • http://guitaricky.com/uploads/1/3/0/6/130621369/tiluzidepawufepaneka.pdfIn PDF document text
    • http://beenvapored.com/uploads/1/3/0/2/130289225/vuvujanovatovix_tijakijotuxebuv_xerelorob.pdfIn PDF document text
    • http://revsurfco.com/uploads/1/3/1/3/131380636/6011550.pdfIn PDF document text
    • http://ceasultrezirii.com/uploads/1/3/0/5/130550697/jisinezene_zomumesiwil_xujusizobej_filipimurave.pdfIn PDF document text
    • http://unleashthemusician.com/uploads/1/3/0/5/130538995/0c26339.pdfIn PDF document text
    • http://johnnylayne.com/uploads/1/3/0/8/130814342/f227c0dac0ad8.pdfIn PDF document text
    • http://beautifulpinkk.com/uploads/1/3/0/5/130588989/5b3ca1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

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_off00006348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 9992 bytes
SHA-256: 147a3447ace8c41ec873c87a52bc08e2092e944b989f181d3a1aac873cebbf1c

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