Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4e8b70f4c42f69…

MALICIOUS

PDF

39.3 KB Created: 2020-11-05 15:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: bb3cf68c1c1c497f99fe5b22977c4cde SHA-1: 5adc257de257bd9eafedfcab155c0685e9482942 SHA-256: ed4e8b70f4c42f693a29d1a72179310472437f2c55426c0c6553cb33ec66eeb3
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=terraria+celestial+cuffs PDF link annotation
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/raramatimufageg-fawaniruzolaz.pdfIn PDF document text
    • https://sixifemawo.weebly.com/uploads/1/3/4/4/134470876/ragifilixokiverekaba.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/jepar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac4be13-39c5-42dd-85f3-2eeeb9bb1b1a/7953592907.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/42338061177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2ea56a-00eb-44f3-bbac-d6b66d68ea72/how_much_does_a_teacup_pomeranian_co.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/969395d1-a11a-439a-a7c7-42677a32e405/fufapovuxasigojisogixav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c8cdc2-83d0-4dce-8ca2-a12b7769fa24/gipejepasanido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d667e7-6d35-481f-8f31-5c1c1f4b3510/safusasozakurul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223ace19-ca0d-4d30-b1a7-f6d69b194a6c/listin_diario_guia_deportiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b33a5ef-a42d-4b61-9fe3-178763b95bc4/eureka_vacuum_cleaner_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98cc3a0-ecdb-4235-96e3-3d8fcf7e252e/amar_chitra_katha_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96658ac-2293-40b6-801b-e65827e8ed7c/bixizux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4b8c17-e69b-493c-b2ac-a5df25ee891b/primer_dia_de_clases_para_colorear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae7d9359-cb8e-4b8c-87ce-73628e3693dc/kujipomozidezuzu.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_off00005dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC5 4824 bytes
SHA-256: 900f77221f01c56b8c574b84923074307b681c7179398e6f2c1e00a6834f8e9e
font_01_sfnt_off00006e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 10024 bytes
SHA-256: 152296a335d8e77702a5341a0bbc4ddd2d955fdc5ea2d943ef62607f8a3f79a3

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