Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0d3a93ec404cb8…

MALICIOUS

PDF

54.4 KB Created: 2020-04-21 04:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2021-02-09
MD5: fdf2b1f3e050185a8ab39b23b333ce05 SHA-1: d942e7e1dad4c18b02e2313f752b4dbcc70e3d30 SHA-256: dd0d3a93ec404cb8ec815e5af6d9a884dc0569b455ec4906930e82b5d725b6a7
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://katiaponomareva.com/uploads/1/3/1/6/131637279/131637279.html#abstract+data+types+in+data+structure+pdf PDF link annotation
    • http://pattyherrera.guru/uploads/1/3/0/6/130639745/xonupoxebaja-biponufizadi.pdfIn PDF document text
    • http://mhescorts.com/uploads/1/3/1/3/131380845/zenabukove.pdfIn PDF document text
    • http://moleteaworks.org/uploads/1/3/0/6/130639116/gigivobozu.pdfIn PDF document text
    • http://gadgetkid.net/uploads/1/3/0/7/130776682/lobon.pdfIn PDF document text
    • http://benthelmerchandisebusiness.org/uploads/1/3/0/5/130543598/visamodudepefakarepu.pdfIn PDF document text
    • http://ecocleanersorcasisland.com/uploads/1/3/0/9/130969045/fotetudutesat_fisazijugovefes.pdfIn PDF document text
    • http://polestartechnologyassociates.com/uploads/1/3/0/5/130551001/guvomux.pdfIn PDF document text
    • http://northconwayfarmersmarket.com/uploads/1/3/1/4/131437427/c2e317ab7a4.pdfIn PDF document text
    • http://beautifulspiritmindbodywellness.com/uploads/1/3/0/4/130489523/1815e.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F9 8860 bytes
SHA-256: 4c0be1678f1305bf6e60698434241ecfa99d5d28a4ac74ee07deb134d8b3cc44
font_01_sfnt_off000096e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E8 2228 bytes
SHA-256: 236d54f3e2479d5e72da3d1be4616617e509581c3e9108e812f40a19f40d28ff
font_02_sfnt_off0000a107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA107 16224 bytes
SHA-256: da097a8c459adbfdf1b1d97412e41569b305acf822c6e113ff3e46e38a168572
font_03_sfnt_off0000b651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB651 7624 bytes
SHA-256: 062cd092fca4e6fdf11fcb05a606e37b8a128a496b3c9d0f71393d7d1b3c8f30