Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34541698927e887…

MALICIOUS

PDF

51.3 KB Created: 2020-11-07 01:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: fcc923cf54ab35517fd0af3b644d7822 SHA-1: 2ee1c6399ee4c624edcb46688a2a6a1a52f6796e SHA-256: d34541698927e887f3c2d2f28c0c9df22762539174aa4059d520a31ef73c6072
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://traffset.ru/123?keyword=brady+bunch+movie+cast+sequel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f8cbab481861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_5f8f17976b7ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_5f953cfd70c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_5fa130ea79b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_5fa5d7db5705f.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/henghuili-files2/ap_grama_sachivalayam_previous_question_papers.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/reviews_of_derma_rpx.pdfIn PDF document text
    • https://jasobegofur.files.wordpress.com/2020/11/7843731627.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/jejonadumenuwexowoju.pdfIn PDF document text
    • https://gezovuxa.files.wordpress.com/2020/11/xexupixurefiwosonubazima.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_off000088cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CB 5656 bytes
SHA-256: fb52a8624c8cd765a958d4fd0db03ea6e063aaf2706cb99b6f1547c262962666
font_01_sfnt_off00009bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDF 10696 bytes
SHA-256: 90937ceba05a16852ca23357c47b4d0a75d6c60277d4c6e6f1b754683fe19236