Malicious PDF — malware analysis report

Static analysis result for SHA-256 682db7f92b8192b2…

MALICIOUS

PDF

37.1 KB Created: 2020-05-13 10:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 193f8765d39f277edf127d00ee555829 SHA-1: 02174ffa27bcb416e300be3e32b3003d9caa6209 SHA-256: 682db7f92b8192b2a47fdc3a0da6f903266e9a94b9f041b55e86c57fef96d8c2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL http://ductcleaningdc.com/uploads/1/3/0/7/130776478/130776478.html#business+glossary+template+excel appears to be a lure for a business glossary template. The extensive link farm suggests a malicious intent, possibly for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the PDF structure and numerous external links are strong indicators of malicious activity.

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://ductcleaningdc.com/uploads/1/3/0/7/130776478/130776478.html#business+glossary+template+excel
    • http://1514farms.com/uploads/1/3/1/4/131406507/bemej-murug-kudiv-xazuse.pdf
    • http://aaliyahmechelle.com/uploads/1/3/0/5/130551271/favuritix_wejabimiz_getonalobef_votumigavu.pdf
    • http://cherrycreekcheer.com/uploads/1/3/0/6/130639336/7909156.pdf
    • http://pattiandersonphotography.com/uploads/1/3/0/6/130603965/4688826.pdf
    • http://truebswetter.de/uploads/1/3/1/4/131406717/9f1ce4.pdf
    • http://thera-strap.com/uploads/1/3/0/5/130550770/1c1f70eb9730f.pdf
    • http://browardcountycriminallaw.com/uploads/1/3/0/5/130550830/xaxifafafudo.pdf
    • http://buffalomom.com/uploads/1/3/1/1/131163492/nubajigu.pdf
    • http://tip-ct.org/uploads/1/3/0/8/130874409/5527267.pdf
    • http://kaffination.com/uploads/1/3/1/3/131398128/bomori.pdf
    • http://casualteez.net/uploads/1/3/0/7/130776206/4632487.pdf
    • http://thelifedistrict.com/uploads/1/3/1/0/131070722/d2ca944.pdf
    • http://izzyleap.com/uploads/1/3/1/3/131379405/1309118.pdf
    • http://ecopropertysolutions.net/uploads/1/3/0/5/130550769/aeb4cc1.pdf
    • http://themedispagynecology.com/uploads/1/3/1/6/131606629/9ccd9b00c87.pdf
    • http://positionlessbasketballtakes.com/uploads/1/3/1/6/131636879/6580059.pdf
    • http://craiglang.ca/uploads/1/3/0/5/130589297/viruwemedavenuresiso.pdf
    • http://ridiculousredtails.com/uploads/1/3/0/4/130475939/sitebojusoxev_ziwoxosaki_wijuzonob.pdf
    • http://trainmoore.net/uploads/1/3/1/4/131438203/jotesesuzabenemonewi.pdf
    • http://stonecreationsbycolleen.com/uploads/1/3/0/4/130488316/dasematitezalupuxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ba.bin
c322adfbb2b086e72563372601b8ad0a82715789da88aebec8d53b6427ad319d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BA 9584 bytes

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