Malicious PDF — malware analysis report

Static analysis result for SHA-256 055edde0b0847b1e…

MALICIOUS

PDF

46.7 KB Created: 2020-03-28 04:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3091666ee108417c47f4a5099b93053c SHA-1: 2dc75a1401e149e19be691e15bfa031363ed9f32 SHA-256: 055edde0b0847b1e53071fc79b77f44c3f9f86d1061ca2a8fadf71bc5320e9f1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, forming a link farm. The primary URL, http://blockchainambassador.ca/uploads/1/3/0/7/130739020/130739020.html, appears to be part of a larger network of SEO-optimized PDF documents designed to drive traffic. The ML classifier strongly indicated maliciousness, supporting the link farm behavior as a tactic to potentially distribute further malicious content or engage in SEO manipulation.

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://blockchainambassador.ca/uploads/1/3/0/7/130739020/130739020.html#cuales+son+los+elementos+del+circuito+electrico+cuando+encendemos+la+radio
    • http://gaytherapy.net/uploads/1/3/0/6/130640090/8a40e.pdf
    • http://blvd420.com/uploads/1/3/0/5/130589007/a5c0c.pdf
    • http://gardenstylewithsaraantin.com/uploads/1/3/0/2/130289772/pesowekifakama-kivokiv-bobusigebeki-tifosebodogobiw.pdf
    • http://drwofchuck.com/uploads/1/3/0/4/130435553/punovubume.pdf
    • http://youngscientistacademy.com/uploads/1/3/0/6/130639760/dofarokafik-gejanimadorudof.pdf
    • http://s-p-q.org/uploads/1/3/0/7/130739934/7818473.pdf
    • http://www.uncommonravenmusic.com/uploads/1/3/0/5/130590200/lajokas.pdf
    • http://marykrausconsulting.com/uploads/1/3/0/6/130620429/vomakudoz_xupinakogutiri_regewereriwe.pdf
    • http://twoklassens.com/uploads/1/3/0/7/130738504/9415244.pdf
    • http://benteolis.com/uploads/1/3/0/5/130539599/kugatow.pdf
    • http://vinobikinvestments.com/uploads/1/3/0/6/130620573/ruxeletow-zivatumotem.pdf
    • http://mesawindshieldrepair.com/uploads/1/3/0/7/130774966/velewumafelitavapivo.pdf
    • http://eyelashescolumbiasc.com/uploads/1/3/0/6/130622012/1984089.pdf
    • http://mx0.perichoresis.de/uploads/1/3/0/7/130739061/0f263.pdf
    • http://www.reaper-reworked.com/uploads/1/3/0/4/130488198/gusinarasibav.pdf
    • http://lightningbabe.net/uploads/1/3/0/4/130476050/c4f832a1fc3.pdf
    • http://campampersand.com/uploads/1/3/0/4/130476200/3692882.pdf
    • http://checkeredflagdrivingschool.com.au/uploads/1/3/0/3/130323774/6009137.pdf
    • http://pairadicebarbershop.com/uploads/1/3/0/3/130323693/49551e20e4b5.pdf
    • http://ellensburgwinterhopbrewfest.com/uploads/1/3/0/9/130969671/radoxogelijet.pdf
    • http://textdept.com/uploads/1/3/0/7/130776822/wawotedugawivefuxeza.pdf
    • http://hawaiilawyer.co/uploads/1/3/0/7/130739023/eae9ea93136b0dc.pdf
    • http://betaregistration.com/uploads/1/3/0/6/130620981/bajez_jafizenux.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007456.bin
a7d65f93e9c0b3a1f0764ba1e677f715ec2f4a1851b2f473fb6e65a940b68c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7456 9036 bytes
font_01_sfnt_off000094fb.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FB 16036 bytes

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