Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b207d2f3e4dd9a9…

MALICIOUS

PDF

36.1 KB Created: 2020-11-09 16:11:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 28ce6a555086bb05cb810969f321a1c4 SHA-1: 294b398c8c684e2cfd3c0566c6429cbe2614b59e SHA-256: 7b207d2f3e4dd9a9892f3d1ada4afcf9e8c89ec72b1d54753e029b9619e8e1f9
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://traffking.ru/aws?keyword=60+seconds+unblocked+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_5fa0cb813774d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f88147a89ee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_5fa72699e384f.pdfIn PDF document text
    • https://jugidemavewug.weebly.com/uploads/1/3/4/2/134265355/27c0a6c.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/7625a164-f298-4a1a-8672-54a38a63cbe8/dekudura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96df32b-c062-4b3b-8b43-8e9fbe2a9b68/dental_decks_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/glittering_generalities_advertisement_ariel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c674f35-f436-42b7-a346-9ee099f6c936/wurizufilepojikemiw.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/kentucky_derby_dresses_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/30809396989.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/55917157280.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/trey_songz_age_2020.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_off0000506d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x506D 5208 bytes
SHA-256: d448db3092933275622917d2a87b6c530f51e54be9e093a2a6945ddd12801988
font_01_sfnt_off00006230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6230 9888 bytes
SHA-256: a8142312a34b63fffa14b9ae1a7fc994ddccf71fd42c4b7389502a3df6766c9a