Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5060a7d4d5ed75…

MALICIOUS

PDF

50.9 KB Created: 2020-03-21 01:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3d871e841247d59395a7771b996bfa29 SHA-1: 9b14c4c63f0d2de492a8863b9d3963c34e72b13e SHA-256: 0f5060a7d4d5ed756c4e9ac338589ebfdd1ae4236345d2a02738fe5f3f7d4c9d
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be directing users to a large collection of websites, potentially for SEO spam or to host malicious payloads. No scripts were extracted, but the embedded URLs themselves are the main indicators of malicious intent.

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://38babycare.com/uploads/1/3/0/5/130544823/130544823.html#diferencia+entre+una+radiografia+de+torax+ap+y+pa
    • http://myevarsity.com/uploads/1/3/0/9/130969424/3800448.pdf
    • http://badasspugclub.com/uploads/1/3/0/6/130639334/tedarinutet.pdf
    • http://purestreamtechnology.net/uploads/1/3/0/6/130604700/wimimawavuzediki.pdf
    • http://thegreatestmomentinhumanhistory.com/uploads/1/3/0/5/130551777/5181983.pdf
    • http://kl8n.com/uploads/1/3/0/2/130288506/waritulovekifebur.pdf
    • http://mail.ndrives.com/uploads/1/3/0/7/130738955/6303895.pdf
    • http://warriorbunny.net/uploads/1/3/0/2/130291493/wotifemekoziwimo.pdf
    • http://www.jasminerivas.com/uploads/1/3/0/6/130622029/wudifo.pdf
    • http://oregonasphaltrepair.com/uploads/1/3/0/6/130640018/1536290.pdf
    • http://nationalhellenicsociety.net/uploads/1/3/0/5/130543353/rofovepopig.pdf
    • http://doubleiv.com/uploads/1/3/0/5/130589097/bfc6afe4.pdf
    • http://humblerockstars.com/uploads/1/3/0/6/130639052/vekaxe.pdf
    • http://mitchellplumbingllc.com/uploads/1/3/0/4/130488884/8712455.pdf
    • http://www.christonecurbs.com/uploads/1/3/0/2/130270813/59757575ae81e.pdf
    • http://www.koiyoga.com/uploads/1/3/0/6/130604168/6884024.pdf
    • http://yologirlstucson.com/uploads/1/3/0/2/130272512/7508765.pdf
    • http://www.spoondriftstudio.com/uploads/1/3/0/8/130814508/domatutiw-wojamudewusemi-barudom-wemosewag.pdf
    • http://topdecor.org/uploads/1/3/0/7/130775912/detavivu-xejakow.pdf
    • http://impacttogrow.com/uploads/1/3/0/6/130639552/1697905.pdf
    • http://opticagrandjeansalto.com/uploads/1/3/0/6/130639552/wujefuxukamum.pdf
    • http://debbiesdynamicdesigns.com/uploads/1/3/0/7/130775916/8655774.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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d86.bin
b2fe104cc9a4de994e99a90e06e76f723ca2e503cbb52f4ab79bbdba14a0f747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D86 8724 bytes
font_01_sfnt_off00009d33.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D33 2652 bytes
font_02_sfnt_off0000a69a.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA69A 16036 bytes

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