Malicious PDF — malware analysis report

Static analysis result for SHA-256 271f64cfd96b914f…

MALICIOUS

PDF

53.7 KB Created: 2020-10-21 23:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c9b1eab79289166ba2f4d83b24384510 SHA-1: 815d719360268bc3482f0706e639711c73f7f827 SHA-256: 271f64cfd96b914f096c4a7e7508858eb68cc616917b90306457e488437830e3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/pify?keyword=juniper+firewall+configuration+commands+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8de8cc29752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8a5976aaf46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5f8f56a504696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f8a16140e98b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8eee6dcc486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f89089fa8726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8994dc5fe61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f8bcdaba8104.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/tagedijafu-vopevodexori-nivataxorifaw.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/zuxevukemin.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/tipubazawiri.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000866c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000866c.bin)
    • https://s3.amazonaws.com/wonoti/jupixosipabelesifuremakaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/new_york_life_deferred_income_annuity.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/wilukamujakozela.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/tijar.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/ar-_15_assembly_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea06978-faa7-4eff-b8c7-8bfe26f70454/hurt_by_christina_aguilera_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a047aa-5ad9-4852-aa35-f1387951e1ab/42588069073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2477f36c-1ac5-4fc9-abb0-00684ded7574/wugopode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b46e04-1d98-43d3-8cfb-36ca262e2544/kelit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff186a84-c82e-4190-9ebd-5b136b045b3e/bilumirolobozixafirevazek.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 extracted file (font_00_sfnt_off0000866c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000866c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866C 5556 bytes
SHA-256: c3447657d52e32764a8c7179223a38048394238bf2714e2f2beb57f93d20c5d4
font_01_sfnt_off00009946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9946 14556 bytes
SHA-256: 0852d9d8b5da071c6f60917d8dd01476d7ae5013c324531af0737f3fcff09fea