Malicious PDF — malware analysis report

Static analysis result for SHA-256 6546c52cccfd2639…

MALICIOUS

PDF

40.8 KB Created: 2020-10-28 02:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f828be230f1add87e8ce3b39cebbd667 SHA-1: 37b2b00c7ea76dc18fe44a5161059bf2135ca36a SHA-256: 6546c52cccfd2639bbaa448709dbb0920a0bcb616f5eb04565e2d0d69ae47825
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=the+magic+paintbrush+ebook In PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/3720781.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/0b698.pdfIn PDF document text
    • https://wegogutez.weebly.com/uploads/1/3/4/3/134310606/a0de3e88956b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006055.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006055.bin)
    • https://cdn.shopify.com/s/files/1/0459/1737/2565/files/impossible_things_in_the_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3018/2571/files/2070777369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/paydotcom_delete_account.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/types_of_books_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2562/4988/files/28879968692.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/accounting_standards_list_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/general_anesthesia_medicinal_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/vepivetuw.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/43294008740.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/mufixi.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/nulukodafafofuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/98824713645.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/89793818041.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/audit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/12th_science_biology_mcq.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/29470094435.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/mario_benedetti_poesa_con_los_jvenes.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/71500083251.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/compras_y_bienes_de_capital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0650/8186/files/luigis_pizza_menu_del_city.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9326/3004/files/minituvobomizadojuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7650/1148/files/xawusibipopo.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_off00006055.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 5468 bytes
SHA-256: b3b460720e71887bd17dea24dabdd09d4b4b24f7e7e3f5447c56499b7c5a72b3
font_01_sfnt_off000072c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C6 10216 bytes
SHA-256: 834473c661ce00b25bac1578388a7c07178c0e46210e353de7cb44a7028d340f