Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a83bf712c4cbb6…

MALICIOUS

PDF

41.7 KB Created: 2020-10-08 02:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 264d7d2e3c72284bdace2db070621295 SHA-1: 16fb778fbc25fc329c80dfe73b056ea9cafcaca0 SHA-256: 34a83bf712c4cbb62db666630a8d77fa76417c7f0ba5c7250c958cbb8b181395
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=ugly+betty+book+pdf In PDF document text
    • http://bibogerij.elmhs.org/uploads/1/3/1/0/131070786/kusasoluvogovo_refegesunupozi_madir.pdfIn PDF document text
    • http://pixododi.cbccroswell.org/uploads/1/3/1/1/131163992/8319963.pdfIn PDF document text
    • http://files.mgarrigan.com/uploads/1/3/1/4/131453456/rupepawutijowaz-lesed-tanatowoxifi.pdfIn PDF document text
    • http://files.clarinetsdirect.net/uploads/1/3/0/7/130776275/809cfa5b8e.pdfIn PDF document text
    • http://ribod.theapostoliccommunion.org/uploads/1/3/1/3/131383761/vewagi.pdfIn PDF document text
    • http://jaman.tristannmortimer.com/uploads/1/3/1/4/131406352/d5fc9f28ddb647.pdfIn PDF document text
    • http://files.sclerochronologylab.com/uploads/1/3/1/8/131856852/9803508.pdfIn PDF document text
    • http://pikilufof.hhsclassof1979.com/uploads/1/3/0/8/130814229/lumemabegu.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/1/0432/4933/6483/files/solipukimumig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0410/3325/files/cabarrus_county_school_calendar_2018-19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7503/1206/files/michelle_vasquez_and_michael_phillipson_sacramento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/35991368922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4079/5555/files/metal_gear_solid_codec_screen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/ucp_of_central_florida_bailes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5297/7313/files/barn_burning_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3806/6856/files/impossible_game_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4642/7031/files/kantai_collection_nagato.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_off000064ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FF 5024 bytes
SHA-256: 9e03964e96820798b719f139063cda521c3324311795cb28aeb977fc08d4e5c0
font_01_sfnt_off0000763d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763D 10484 bytes
SHA-256: 6fd156bc01ad1624b3aeff3ea7a407645e88e846904afa419def3c876bf8b409