Malicious PDF — malware analysis report

Static analysis result for SHA-256 27234d8f92756ca7…

MALICIOUS

PDF

35.2 KB Created: 2020-10-29 00:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 87f08b67dd4d1fc37144541f6ff8b0d0 SHA-1: 2a13727155d481edc6c6498c81c349248b152815 SHA-256: 27234d8f92756ca7e16c074a4c7512e6eaf16c7e5fa91e73b4807bad3636955c
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=download+fake+gps+spoofer+apk In PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/zirij-kijaj-dajad-saretaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_5f94ce05eda1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408863/normal_5f959fcde9ff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f99b0fd039eb.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/debirasin_kedawofeput_zomofomavu_dobafag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412778/normal_5f96ba2899258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5f91b9771d010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f9387fc59f7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/intelligence_report_writing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/dynamics_of_machinery_reference_book.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/biological_science_third_edition_by_taylor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702699bb-4f5b-46a0-8529-57ed273b5ee1/lowenozifivefufa.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/60876257452.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/manual_of_aircraft_accident_and_incident_investigation.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/6856071812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233d0a97-1aad-46ef-8f76-3a5ea970fcdc/vekapumibotumidiripovuvel.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/wixagiwarawofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81459905-5f2c-49fe-9e17-11a2855390f2/de_grados_centigrados_a_kelvin.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/wovidejop.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_off00004d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D52 5364 bytes
SHA-256: 4a746996c76d80e56131f213f2f0d132dfc15a2bdbe82a09ac0d01d388f05e0d
font_01_sfnt_off00005fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 9380 bytes
SHA-256: 611540d8d40532ae337f09ab248ec4397bcd0409d0004e19ad058f0e2339b68d

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