Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6631eeef6c57faa…

MALICIOUS

PDF

43.1 KB Created: 2020-10-25 13:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 0a85725bd318985e6131f755f903b4cc SHA-1: 32047d29eed87adfd45c33a6bc4bc6df7116ffbb SHA-256: d6631eeef6c57faaa64e74155fcd8dd6194f131709f7b2ba1e61cf63c89244b6
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=fanco+ceiling+fan+installation+manual In PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/25c04ef.pdfIn PDF document text
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/kososukozunexalelu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://sotokogel.weebly.com/uploads/1/3/4/2/134266154/xagomu-jewonipur.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/zekixubu-zewiwoga.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/60f3dc73.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/6075611.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006bd5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006bd5.bin)
    • https://s3.amazonaws.com/betefowubevat/learning_german_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/ielts_british_council_books_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/blown_to_bits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1750/2361/files/23566755407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3508/5978/files/1383159297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1876/2440/files/que_es_el_sedentarismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/sample_letters_of_recommendation_for_principals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1501/7898/files/exhaust_gas_recirculation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4682/7694/files/unitech_scanner_as10-u_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6271/3256/files/dewifazupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2879/1463/files/ansioliticos_y_sedantes_hipnoticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8763/2813/files/barney_stinson_guide_to_suits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9722/6133/files/4000_btu_air_conditioner_uk.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_off00006bd5.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD5 5060 bytes
SHA-256: 0208f6091036d9bb8275c7370b1b22d7082a53583a7f9bb9a6f0066f9a4182a9
font_01_sfnt_off00007cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFF 9980 bytes
SHA-256: 3bb147738827fc07f2018d188f582c8f793281018dd8a2d5c5a69b93924ac9bd