Malicious PDF — malware analysis report

Static analysis result for SHA-256 715ac75ba3f183d1…

MALICIOUS

PDF

39.9 KB Created: 2020-10-06 21:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e268ea62eca4d0a177f757bf7016b97c SHA-1: 30fa7711a8f0ad5cb9fb921e25d22905e16ba9d9 SHA-256: 715ac75ba3f183d14a15fe35e4e932ed8d7b065907a3e6c2eae875bfa1ec17d3
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/strik?keyword=dr.+becker%2527s+real+food+for+healthy+dogs+and+cats+cookbook In PDF document text
    • http://mapomog.mrshinsonmath.com/uploads/1/3/0/7/130775471/9010364.pdfIn PDF document text
    • http://files.pegenter.com/uploads/1/3/2/6/132682892/6307522.pdfIn PDF document text
    • http://pimaju.academicswithaplus.com/uploads/1/3/2/6/132681647/kudaxidetoxe_ritituxud.pdfIn PDF document text
    • http://jatizu.josefjakobs.com/uploads/1/3/2/7/132740978/xukuvobirizoj_supitojepubu_nuliwozin_bisegodezevosiw.pdfIn PDF document text
    • http://xonowifo.benjaminjamesdrees.com/uploads/1/3/1/4/131407504/zetidurixoz-momezizidaveb-saforelevumis-musobepovubemo.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/70a87ddd-0881-46d3-8050-0804856babf0/99011944665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4659/9845/files/kowijowuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/epiales_greek_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d2bd06-75c1-445c-aef6-25a7c4f2206d/mojofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fcdc074-0900-454c-a57e-485eb530d103/kekajokiduma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36955059-24a9-4647-a454-f3366fa2bb24/zawisowokud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/093faad9-276a-4bf6-870c-077c023d1150/pazilubukasuzoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3b142f-92e7-4747-b2ac-3145111d47f2/sumaliwefejowazezalukak.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_off00005cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC8 5656 bytes
SHA-256: 41b0eceacac657eee73bad47a0ecc60111260d15d47bb8b705abacc47d7305ea
font_01_sfnt_off00007022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 9972 bytes
SHA-256: f4fe76dd47d39ceea9a1967821b707ff097cc8a46bcfb4ef7277a9c869177faf

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