Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7a5b618f082e03…

MALICIOUS

PDF

46.8 KB Created: 2020-10-25 22:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5eb911a2d443a925133bf23a8a5ea988 SHA-1: df00ac115e240c14a2478f44685985c5247bc871 SHA-256: 9d7a5b618f082e03973ba32dab4e1166b55f39f0d3ecca3bc743181734de0679
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/aws?keyword=texto+argumentativo+caracteristicas+y+estructura+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f880a1e4ad3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_5f9428c5ddf18.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007482.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007482.bin)
    • https://cdn.shopify.com/s/files/1/0497/4372/4698/files/rasodowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7971/9330/files/principales_representantes_de_la_investigacion_cualitativa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9159/3883/files/iti_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8491/3076/files/67407343290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/kefarasalakivipebe.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/english_to_hindi_words.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/wiberunapusozirarunuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/wakafogedugudaduxukibe.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/86811210057.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/55083937261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9366/0326/files/because_of_winn_dixie_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5354/5632/files/subeteziwawowabige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0912/8626/files/humi_care_black_ice_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/fluid_mechanics_flow_measurement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1bd2b01-5a40-4d38-9985-38aa4002f3d7/12576047184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e49847-6e6b-4a2d-b64e-689b2a8ebd8a/95707482819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab584e1a-ff09-45c2-acc4-310145f16f30/song_of_the_hummingbird_themes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d20740-7e75-4dd5-82bc-c21b2d758d01/vizikaluvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d6ce5b-c469-4707-a434-023b04e578ba/59364280407.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/ice_cream_editor_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/45425926676.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_off00007482.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7482 5624 bytes
SHA-256: b0218d817fa7eb58e393b3942db739f82b209bf218a19b7a839d742b544b3d92
font_01_sfnt_off0000879d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879D 11016 bytes
SHA-256: 1ef3cf3a0c815edbfdebf046deba366ae4146912f0247a226bd2e1d0c0b4115a