Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1439bdeee8423b…

MALICIOUS

PDF

39.1 KB Created: 2020-10-25 23:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 51834bcd71a36ddaec2a372a667febae SHA-1: c3924b4993facad3927a8a7895190595a50ed283 SHA-256: cd1439bdeee8423b6f8a6481e02148048f2db9790817591e8e56173672ea02a7
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/123?keyword=the+automotive+chassis+volume+2+pdf In PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/sokodivuniwa_gamirek_zerezodorukowo_gajib.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/4131719.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/soladu_betaxulazuxigid_fixakutoruzubad.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/b933b046e27.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005af9.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005af9.bin)
    • https://uploads.strikinglycdn.com/files/cce35e32-15b6-4802-82c6-c957661bf7fe/torukubusawiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894f3435-306b-49ac-925c-7843108f74de/beborakofalajuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe73157-e196-4101-a5ac-01ef9c805b11/21058879073.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/befob.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/benefits_of_mindfulness_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/97670321406.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xalibun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd40cc14-ce51-422f-b344-7ea2405e6581/south_park_hide_and_seek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6e4593-100c-4692-9933-a7a9e6ab7e89/nilapobixabaregelarules.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_off00005af9.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF9 5440 bytes
SHA-256: be5c6dbcc442a63748fe2d759e576bc06091e988615450216480cf15af2161ad
font_01_sfnt_off00006d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D73 10040 bytes
SHA-256: ddba9032d605c25a45bf52cc33469351e7f4ab55787eb62b89e17cbd2c80eac9

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