Malicious PDF — malware analysis report

Static analysis result for SHA-256 29975fedcf801789…

MALICIOUS

PDF

46.3 KB Created: 2020-10-05 18:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1929ed4e3e2102107348ce1ccfaa60ab SHA-1: e71d772cc70054bfa4fcbe2d56709b66049bf0d5 SHA-256: 29975fedcf801789f7660ba6fe81cd4a25f0034bbfc86db57a910b047a32f3d4
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/strik?keyword=bootstrap+responsive+iframe+pdf In PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/61440779459.pdfIn PDF document text
    • https://site-1042587.mozfiles.com/files/1042587/89761551742.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/fixidilixexazilolo.pdfIn PDF document text
    • http://files.visionary-affairs.com/uploads/1/3/1/8/131856278/rutifusus.pdfIn PDF document text
    • http://files.ronkachelmeier.com/uploads/1/3/1/4/131406947/jedasuripupidarej.pdfIn PDF document text
    • http://deneji.enroutefashionboutique.com/uploads/1/3/1/4/131482962/8728488.pdfIn PDF document text
    • http://vojini.lindarossostudio.com/uploads/1/3/1/6/131606347/6227324.pdfIn PDF document text
    • http://tejezo.drkoppmd.com/uploads/1/3/0/8/130813765/kobetipakipawu_bagezexoji_tilabufosaba_mibafirelim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/analytic_geometry_course_description.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/gta_san_andreas_indir_gezginler_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0038/3646/files/31979993401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7827/8550/files/mitch_charter_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/citing_textual_evidence_worksheet_high_school.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_off00006c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6B 5264 bytes
SHA-256: 397037e850fd5f926364880926d19f23e5307fbb1d00499a652d031f144376b8
font_01_sfnt_off00007e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E47 14432 bytes
SHA-256: 0ffe93d6b7c37084824d899f4ced7894af5b927c66cc79926735d350d8a51cdc