Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c71c8d8c1f2a402…

MALICIOUS

PDF

70.8 KB Created: 2021-02-09 23:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7ab9c34659d139a9b4d3391808bd42f4 SHA-1: 7e5b89326855fbadd1af139f2e6f29f6894b0ed3 SHA-256: 5c71c8d8c1f2a402259a1ed74305ac19fdf7ded545127babc7bda99aff583bf6
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://baarspo.ru/wb?keyword=consolidated%20audit%20report%20format%202018 PDF link annotation
    • https://cdn.sqhk.co/vixuzemabad/dibOgdm/nixobufilojuvadu.pdfIn PDF document text
    • http://ventager.online/dewizodubomawizepenajsk8t.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/9ibhbha/pokey_crazy_ballads.pdfIn PDF document text
    • https://vewiwuxipax.weebly.com/uploads/1/3/2/6/132681682/b9d9d7f1.pdfIn PDF document text
    • https://cdn.sqhk.co/dumoniriwo/6mTibbh/1spotmedia_3._2_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/jgOghgd/setewoboxegep.pdfIn PDF document text
    • http://discovljzg.fun/38373197650jgw87.pdfIn PDF document text
    • http://xxlmature.site/xepasaxesogupkjmm4.pdfIn PDF document text
    • https://kekuzisalan.weebly.com/uploads/1/3/0/8/130813403/7557710.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/hgngdig/thimbleweed_park_switch_physical_ebay.pdfIn PDF document text
    • http://nebibila.iblogger.org/96196556819.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/g2hfoNN/rexenilimozejujilukefiru.pdfIn PDF document text
    • http://storeplus.info/leaf_cutter_ant_nest_structurer8xip.pdfIn PDF document text
    • https://kofodurulivikaf.weebly.com/uploads/1/3/3/9/133997487/5dbf5a0.pdfIn PDF document text
    • https://rofupujo.weebly.com/uploads/1/3/4/3/134335987/9179904.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafafomuripag.epizy.com/92019164595.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/rajupuselelememikizasoron.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/mythical_creatures_word_search_pro_answers.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AA 5612 bytes
SHA-256: 901b91ed686d0ff9831ee8e3d14aa36eaaf8a5fc3334fdb7224cd7ea4758a6ed
font_01_sfnt_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 10408 bytes
SHA-256: cfb4cc9bca9b60b03e8d1d63912a037b5526c58999047a11133cfa4c949e525c