Malicious PDF — malware analysis report

Static analysis result for SHA-256 d403c63922936107…

MALICIOUS

PDF

56.3 KB Created: 2020-06-20 01:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b8d8cc796eee4a927596aef6342f4bca SHA-1: 41a9642bd116e619c3ba8740a2dfebd1eeb848e6 SHA-256: d403c639229361071066bb8f88513d8e3ac62032714c11c88255ae262c07763e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, many of which point to other PDF files hosted on similar domains. The document body mentions 'Neverwinter pet guide', suggesting a lure to attract users to these external sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host malicious content. No scripts were extracted from this sample.

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://youcanbepregnant.com/uploads/1/3/0/6/130621470/130621470.html#neverwinter+pet+guide PDF link annotation
    • http://mail.loscalifornianos.org/uploads/1/3/0/6/130604922/c7bc46953a.pdfIn PDF document text
    • http://culturalminds.co.uk/uploads/1/3/0/7/130738792/liwajadojos.pdfIn PDF document text
    • http://mystoryinalocket.com/uploads/1/3/0/4/130476722/66a92a96c8e.pdfIn PDF document text
    • http://tucsongrouphomes.com/uploads/1/3/1/6/131636702/6174166.pdfIn PDF document text
    • http://gselectric.org/uploads/1/3/1/3/131397940/ramepanemisevi_zunitukuziv_govovabajunijat_fizozapodamob.pdfIn PDF document text
    • http://jardinesexecutivetravel.com/uploads/1/3/1/0/131070843/1017910.pdfIn PDF document text
    • http://front-online.me/uploads/1/3/0/9/130969169/gixozolupigowiwuvabo.pdfIn PDF document text
    • http://mecanbike.com/uploads/1/3/2/3/132302735/bb5b491a0f745.pdfIn PDF document text
    • http://guaguitas.com/uploads/1/3/0/2/130272458/dakizajene.pdfIn PDF document text
    • http://youbangtaobaowangwangqunfaruanjian.thesurge.cc/uploads/1/3/0/8/130874668/lujowunano-gojesolowusalit-riraluki-gaxedeton.pdfIn PDF document text
    • http://autodiscover.dlak.co.ke/uploads/1/3/0/6/130604054/mixivagos-tulekoxorog-vonifalo-fewaweg.pdfIn PDF document text
    • http://bharatkemitra.com/uploads/1/2/9/6/129626313/129626313.html?whatIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D64 4600 bytes
SHA-256: 40f69746366d319136408a5b558318eeceb6a6149f698448800b80d271b7c16a
font_01_sfnt_off0000ad27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD27 11652 bytes
SHA-256: 4138975b0b2ad241952765d6dcf564870e727b58da55e3e188ba57e9a64daa84