Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a046182877e141…

MALICIOUS

PDF

62.4 KB Created: 2020-11-05 17:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: ed71d2f211ddb32a59dab54fb4fa38b2 SHA-1: a8ce5c95200648611ec1c368936de57efbe9663e SHA-256: e1a046182877e1417e8541dbc87db4949d03d0c22ec57325011807648d7be758
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://trafffi.ru/aws?keyword=pyramid+plunder+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416654/normal_5f9b42e635c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f9601aab7562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5fa33bb10e666.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/garorowa/watch_black_butler_dub_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/j_vernon_mcgee_commentary_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6cc66b3-0a25-4361-809f-560f04afaf9d/molar_mass_and_conversion_notes_and_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7197/7640/files/google_docs_asdk12_sign_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc2e5dd-49e0-49e7-a5a5-45cfd9e73929/sujugo.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/the_sirens_of_titan_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba93a974-1d70-46a1-bb66-f27db9ee3f53/rusopukokuxutigafikifoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b971e04-227d-4f9e-b814-6d96c9799fbb/tvg_watch_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcec452b-893a-4b0d-bafc-afa2cc913575/gapegunomokijadefoz.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/modapuvu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000bfee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBFEE 25976 bytes
SHA-256: 0e09463f305cd1faeb094c7f978ae013c13e89f1b90a161b54b4139f93c75cf0
font_00_sfnt_off00008a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A70 5204 bytes
SHA-256: 5e02fd4bb3589967946c30e5c6bb87fc079b2c86ed1df47e9f7e4058f785a9ce
font_01_sfnt_off00009c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C18 10452 bytes
SHA-256: db071a7d445af5cfd98c599fb0f68d48a76f55a03099e801840f84ed47295380