Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc90e82c591afff6…

MALICIOUS

PDF

42.9 KB Created: 2020-11-02 04:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: f316fbc13149cf529dc577ca0bbabf55 SHA-1: 9bf73ced2b5af33c7cf510870f29c849d1ac1901 SHA-256: dc90e82c591afff6d54fc0c2b997812822de8b7060e0a702b08718182da51aba
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/aws?keyword=la+magia+del+orden+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5f9b68418d945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f87c9c2565a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8003/3474/files/khyber_pass_map_india.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/tixajud.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/14898541697.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/crossfire_tome_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/1779/8310/files/former_employee_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/adobe_indesign_cc_2019_shortcut_keys.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/2019_2020_school_spelling_bee_study_list_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/ecological_resilience_in_theory_and_application.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/74238576951.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/kepag.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/wetherspoons_vegan_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/onyx_and_ivory_series_book_3.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/15471677355.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000590d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x590D 4832 bytes
SHA-256: 4e7d04abffcef0d9d9e8457dc63548356717ab2517ccd62ec9e879df47be97b2
font_01_sfnt_off0000694f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694F 11664 bytes
SHA-256: 29db4cfa3b43e1d558c8306562ddab60d3a12d8f6660adad4e1fdeb4d937bd77
font_02_sfnt_off00008f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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