Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac0262abc741be0…

MALICIOUS

PDF

42.5 KB Created: 2020-03-06 16:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8acb76b1bd72d1ed0baf50f3e1229117 SHA-1: e881d75805f6897b171cd22caabe6e4fa8747236 SHA-256: 5ac0262abc741be0a5c7a37a5c2aee5c645f2ff454dc68f33330a125bafa4ebf
104 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, flagged as a link farm, suggesting a phishing or malware distribution attempt. The document body's text, though garbled, includes terms like 'journal ledger' and 'trial balance', aligning with the 'SE_INVOICE_LURE' heuristic. The ML classifier strongly indicates maliciousness, and the presence of many external URLs points towards a likely attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://heathsresort.net/uploads/1/3/0/5/130588282/130588282.html#prepare+journal+ledger+trial+balance+trading+account+profit+
    • http://carriepwalton.com/uploads/1/3/0/6/130621160/50f835042cd3640.pdf
    • http://neighborhoodcatadvocates.com/uploads/1/3/0/7/130775561/34c92.pdf
    • http://moralehemp.com/uploads/1/3/0/6/130620957/kegije-sabul.pdf
    • http://www.curiousproducts.net/uploads/1/3/0/4/130475992/5015464.pdf
    • http://www.smimarketingservices.com/uploads/1/3/0/5/130590436/doruvomimopubon_xutosebitof.pdf
    • http://corierandolph.com/uploads/1/3/0/5/130551202/wupofuneworo.pdf
    • http://towncarservicekirkland.com/uploads/1/3/0/4/130435820/jogopizamax_zixekapiruves.pdf
    • http://www.thehotboxcos.com/uploads/1/3/0/4/130435573/dubumeronuvurir-sasowiwemazoji.pdf
    • http://www.adobedelsolpropertysolutions.com/uploads/1/3/0/6/130621853/wigugidasewi_vawunojex.pdf
    • http://katiesopocidrake.com/uploads/1/3/0/3/130379315/zinujorapovovu.pdf
    • http://www.tolpig.com/uploads/1/3/0/6/130604742/bed8aa54.pdf
    • http://mineolatrading.com/uploads/1/3/0/4/130489539/xatusu-gazopigosixivoz.pdf
    • http://phonetac.com/uploads/1/3/0/6/130639946/ledepom.pdf
    • http://aftertrust.com/uploads/1/3/0/8/130814636/repotosinopaxuso.pdf
    • http://bostontangofestival.org/uploads/1/3/0/3/130379415/cbbc34c8cefb.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_off0000672a.bin
60961aa2adda2cb85ec93d088b06d0437bcf183d7e0d100bc60568774cd0c9ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x672A 8072 bytes
font_01_sfnt_off0000864a.bin
32b54217619f9438721b423dc2f4f4da0f78781b0811ea49af2be6b0310ecf56
pdf-font-stream PDF embedded font (sfnt) at offset 0x864A 16164 bytes