Malicious PDF — malware analysis report

Static analysis result for SHA-256 129276796ee306dd…

MALICIOUS

PDF

40.3 KB Created: 2020-10-03 03:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a0c40e8d510eec5f88d9a847155b458a SHA-1: 8ecb9490180221730e66477b4af8da18fd69ae06 SHA-256: 129276796ee306ddb3ee6bba4b77da31599f92f011d030d8907556a9ca5e0752
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=sketchup+pro+crackeado In PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/filek.pdfIn PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/xipoxerikezalufageruladum.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/wisijazetawuziloxegajim.pdfIn PDF document text
    • http://files.olasazulescostarica.com/uploads/1/3/2/8/132815306/vowuki_kapigor_fegej.pdfIn PDF document text
    • http://pusidofa.quyennl.com/uploads/1/3/0/8/130814788/ledelumabixune.pdfIn PDF document text
    • http://files.iamsonofgod.net/uploads/1/3/1/4/131407088/puvibexifen_nadidejevig_kepapagasix_vudelatakumijax.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/1/0483/8293/5189/files/sepazobasel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4993/4744/files/xetir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0568/1557/files/french_horn_range_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6201/4364/files/blue_parrot_550_pairing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef599401-f006-4775-8335-09a86f51c2db/77703304453.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_off000060fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FB 5116 bytes
SHA-256: fec5fe2170893f820a5aa8024b010053a9692c5258f92259846cab80c68e9065
font_01_sfnt_off0000725f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 10120 bytes
SHA-256: 1c97c9b325179dffc448546d626259640ee7c283bebfbc2886510f72ebd3a5ef