Malicious PDF — malware analysis report

Static analysis result for SHA-256 805d8ec2d42e3d8e…

MALICIOUS

PDF

58.9 KB Created: 2020-05-19 15:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5706eb89c33f3cf37391a0de125018d0 SHA-1: 0a246684e63472f680f8fc6e4f228fa42f5fdbe9 SHA-256: 805d8ec2d42e3d8e39a0c47167323959329a659634d44d72f6086ddebca58c68
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism. The embedded URL and the document body text, which mentions 'Cube escape solution', indicate a likely phishing or scam attempt to direct users to malicious content. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent.

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://perimelep.com/uploads/1/3/0/6/130621487/130621487.html#cube+escape+solution
    • http://nkfanexperience.com/uploads/1/3/0/8/130814681/bijaxuxubotizi.pdf
    • http://malaguttidesigns.com/uploads/1/3/1/4/131406020/8812536.pdf
    • http://ziontbc.com/uploads/1/3/0/6/130620640/bupofurepituran-mimefivimexezem-zogivakavapusul-tarufetene.pdf
    • http://harrisonburgdui.com/uploads/1/3/0/5/130543351/zawugibukedixegusor.pdf
    • http://livestockniagara.com/uploads/1/3/0/6/130621702/f50a8b6ce7e.pdf
    • http://beertimebrewtours.com/uploads/1/3/0/9/130969633/wibesabomip.pdf
    • http://hilltopconstruction.net/uploads/1/3/1/6/131637482/widudiribudut.pdf
    • http://emmakayluxuries.com/uploads/1/3/0/7/130739860/f64634c01d6.pdf
    • http://gris-grisgraphix.com/uploads/1/3/1/4/131407493/nifovo.pdf
    • http://art8light.com/uploads/1/3/0/3/130323184/842731.pdf
    • http://siscleaningservices.net/uploads/1/3/0/6/130620931/jivonaxug_babukose_mijejunur_venulo.pdf
    • http://foodsempire.com/uploads/1/3/1/4/131454046/sesuraludixudi.pdf
    • http://csecomitesocialeteconomique.net/uploads/1/3/0/3/130379293/5380573.pdf
    • http://svkmngroup.com/uploads/1/3/1/4/131484328/duvevo-dolixazit-sixepiwede-rivatisonad.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_off0000bb70.bin
3601045049591ce6becbe32410deab61dad49538286b5627274ab6d1dfdcc4d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB70 10832 bytes

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