Malicious PDF — malware analysis report

Static analysis result for SHA-256 0458c7af1cc0b64e…

MALICIOUS

PDF

44.1 KB Created: 2020-03-31 22:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8bebe8ca88e55345aa70dbf865a661d0 SHA-1: 783866b67d811a38bbf418afbe9fb4b652b9fb39 SHA-256: 0458c7af1cc0b64e15260457527acc9b76e61ebb16f65a2666b38e3a41589625
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs under the guise of information related to vehicle modifications. The primary heuristic indicates a "PDF_SEO_LINK_FARM" with 26 external PDF links, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a 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://palettedecals.com/uploads/1/3/0/6/130639024/130639024.html#dodge+ram+1500+manual+transmission+conversion
    • http://northernillinoispainting.com/uploads/1/3/0/2/130289232/genoj.pdf
    • http://kimsartsandcrafts.com/uploads/1/3/0/7/130775489/1539227.pdf
    • http://linksartllc.com/uploads/1/3/0/2/130289184/5656730.pdf
    • http://mcphersonpoolandpatio.com/uploads/1/3/0/2/130270792/limojarol-tunebebiguviwu.pdf
    • http://kp3d.ca/uploads/1/3/0/4/130436130/gowedupadujinomik.pdf
    • http://loftbyaspuces.com/uploads/1/3/0/3/130323182/fenaferexaxune.pdf
    • http://europeanwaxing.us/uploads/1/3/1/3/131398591/rugorudomizor.pdf
    • http://lodgepolenagitsuji.com/uploads/1/3/0/7/130739056/5596302.pdf
    • http://jaredgilster.com/uploads/1/3/0/9/130969853/dezuza-sarevezu-wiradetudidal-dajuwadix.pdf
    • http://demitrydevelopment.com/uploads/1/3/0/6/130604536/9457410.pdf
    • http://mercertruckaccessories.ca/uploads/1/3/1/0/131070071/9946731.pdf
    • http://maggiesmithcounselling.com/uploads/1/3/0/4/130476215/fonegegifos_waradonugog.pdf
    • http://sparkstrategicconsulting.com/uploads/1/3/0/6/130621324/e3c0cb09b70.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080b9.bin
25214c64e610080abfafcdb27436b4b9653b038eff5812194020dd8201567243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B9 8412 bytes

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