Malicious PDF — malware analysis report

Static analysis result for SHA-256 232421a9f14f9cc4…

MALICIOUS

PDF

72.5 KB Created: 2021-02-10 20:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fc569b1f14ce544ce2c2f66291bcdb5a SHA-1: 37d691e1d69254afe83d89cad3ddcce3c6198f3a SHA-256: 232421a9f14f9cc4815f8bb40fa4dbe60dc12b5bac48374f477df2b3531a521c
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/123?utm_term=wii+controller+flashing In PDF document text
    • https://fujulisu.weebly.com/uploads/1/3/4/0/134042697/lovis-gukefokabudato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387410/normal_5ff6bdb7a5bc9.pdfIn PDF document text
    • https://rasabuziwoziw.weebly.com/uploads/1/3/4/5/134577474/a9e51.pdfIn PDF document text
    • https://gejabadofezeda.weebly.com/uploads/1/3/2/6/132681436/motofogowuxodumigin.pdfIn PDF document text
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/8815518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5ffa23d9b81f2.pdfIn PDF document text
    • https://tuzafezinaxav.weebly.com/uploads/1/3/4/3/134319976/janewovenomi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5fce7b051bd98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_600c8d991b593.pdfIn PDF document text
    • https://lonawapusar.weebly.com/uploads/1/3/0/7/130776864/rugaxufogeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5fd79432b089b.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/rerinago/business_continuity_plan_template_for_it_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/35286091972.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/zovojovosepabijodapanum.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/kofamejaputin.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_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 5156 bytes
SHA-256: 56ff7c295efa2e30ff056b006f208fee2a8f3e29b7fc5b24e0e51aa391aa9d34
font_01_sfnt_off0000f06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06B 10828 bytes
SHA-256: 7dbac1208a662ba339fc02dfa6d9d3f7e0fd5e674546f7c572e5f4ee5d3a4b0c