Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc74545f270c4047…

MALICIOUS

PDF

38.3 KB Created: 2020-11-05 17:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: 8519ab7f74e3337a1dd52e9efc635f59 SHA-1: 5320aef138da48fe04ece218432ba65fe15f7e96 SHA-256: fc74545f270c4047cc3a338b44ed892aea2b767e7746a7e291d9e8e7722082d1
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=steps+of+orm+navy PDF link annotation
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/8368871.pdfIn PDF document text
    • https://megogolu.weebly.com/uploads/1/3/4/3/134314378/a5e4f0132694e28.pdfIn PDF document text
    • https://pugerazetowed.weebly.com/uploads/1/3/4/3/134341851/8639753.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.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/nezanurugega/bidurubove.pdfIn PDF document text
    • https://s3.amazonaws.com/kizuporowefib/ji_hoo_boys_over_flowers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af787492-8769-4209-9d2c-bfda85a4859f/72858957056.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/books_every_woman_should_read_in_her_20s.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/free_smite_promo_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/takanera.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_off00005771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5771 5280 bytes
SHA-256: 15700c768f9964229880580fa05491758fad1f08b465c3049e418e5d64429fcd
font_01_sfnt_off00006958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 10324 bytes
SHA-256: 088eed3c58f36c21920937d79517008715075c1525c616e529c01e21f4abedc1

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