Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cda4c54064f2f0…

MALICIOUS

PDF

72.4 KB Created: 2021-01-22 16:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 57bf162b0321eb294b6a987a6d4cfe31 SHA-1: 3109f78601a84a814381e5119acbaf4d31698184 SHA-256: 09cda4c54064f2f08f584970e535b0629324793b1c27454bf2211278a5b346cd
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/aws?utm_term=avatar+movie+full+hd+free In PDF document text
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/kiwegav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_5fd9ba95639ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452595/normal_5fc8021174aa6.pdfIn PDF document text
    • http://dexowowijovovu.iblogger.org/jarut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5fddb6e69a0b9.pdfIn PDF document text
    • http://zakababonedip.iblogger.org/66618528520.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_5fcb5304ed060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_6004cf0aef945.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403421/normal_5fca33efa359b.pdfIn PDF document text
    • https://rinapaluvubozi.weebly.com/uploads/1/3/4/6/134669605/wesigifufojit_desiso_munel_kiritula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gigezevozaf.epizy.com/sawimabujopegemesenitosa.pdfIn PDF document text
    • http://jesebikalag.epizy.com/sawoturebeduz.pdfIn PDF document text
    • http://nifukugobu.rf.gd/warbringers_jaina_sheet_music.pdfIn PDF document text
    • http://gejebegujisutil.rf.gd/tuxuferonexaxuf.pdfIn PDF document text
    • http://miduzusajaveg.rf.gd/31680505612.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_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 5020 bytes
SHA-256: afe52aa5e6799be5d4751e26bdfa4a82191f85b68cc46dc59616fc1274d8c39a
font_01_sfnt_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 10872 bytes
SHA-256: dd85ad896edcd1cd5d285e9551ee920aaec1c11b122932af2ce29c3d8791467b