Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b7a7b8da415e5e…

MALICIOUS

PDF

51.0 KB Created: 2020-10-25 07:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: bec8266ad93a1d8a4add8c66384e7f8b SHA-1: 4d60b18913dbcbd370fb7d72ec64fdbcf8252265 SHA-256: 32b7a7b8da415e5e7d8a6b410cbeb7776646d21a1f005cd63f513ac9ce46f4d2
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/123?keyword=medicare+supplement+guide+2020 In PDF document text
    • https://bixizevabusiku.weebly.com/uploads/1/3/4/4/134403351/c9d9fd68.pdfIn PDF document text
    • https://kudizuvawemexol.weebly.com/uploads/1/3/4/3/134307781/jatetigoda.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/jarekuja.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/b85210b89462aff.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000078a9.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000078a9.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000b046.bin)
    • https://s3.amazonaws.com/kavitokolezub/82013381692.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/west_african_proverbs.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/55028534669.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/nobesukemaz.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/fojutowinugime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b82874b0-d84f-4948-9c03-9ed6d2e4324c/86149957149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f81082-4271-4f42-8d17-4ff6e11ba196/kepezikekelutaxaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b164f47a-9b71-4f50-b2cf-cfa3954f2c87/98336195565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f57a514-1afa-4d06-a0a0-6b1d8dc44b36/cabron_golan_music_zippy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae22c81-3a49-457e-a949-ee41e48b63d9/stack_data_structure_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ce18d4-232d-4b4c-b2b4-4ce680d6a466/vabifotil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b242bcd5-3b6f-4678-a6c3-74e4854143a6/99593683300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07022e0-d184-4978-ae9e-de4ee5e4911d/91131476829.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/54657771680.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/64727382040.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/naxonosixuwew.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/kaxujabarur.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 extracted file (font_00_sfnt_off000078a9.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A9 5444 bytes
SHA-256: 1e3c996d66e0103bd911a98a8b4e0fb877878e7e776c84fabc31b202c9bb62ec
font_01_sfnt_off00008b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B11 11308 bytes
SHA-256: 6c5a4adf4dc6049435ccece6b2cd6ea57d39317e745816b54006a78123735cca
font_02_sfnt_off0000b046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB046 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2