Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c16bb2fb2f24dc…

MALICIOUS

PDF

71.8 KB Created: 2021-01-28 10:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 204d3dd4d78ea422fa4bba3405fe8e02 SHA-1: 18afc03d322a62376f7de3266f00a5bbf9230612 SHA-256: f4c16bb2fb2f24dc70d49819c04fb8b024123662e4c234a45e2867578d839006
196 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
  • 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://bologen.ru/123?utm_term=silicone+vacuum+hose+napa PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459175/normal_5fee3a0838d7a.pdfIn PDF document text
    • https://ronabamipiboti.weebly.com/uploads/1/3/4/5/134598089/rovokezin-miligikoxizub-xegazos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_600b720b73278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_600cf9f6acc86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408324/normal_5fecc625579fe.pdfIn PDF document text
    • http://airet.space/minecraft_tale_of_kingdoms_2t4q0n.pdfIn PDF document text
    • http://dixuvexawob.22web.org/home_depot_canada_rustoleum_cabinet_transformations.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fca5f4923a6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446038/normal_5ffe5b67f131b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5fd7b76a3e30a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://potosalusuk.rf.gd/xero_standard_chart_of_accounts_template.pdfIn PDF document text
    • http://tesuzegijibonu.epizy.com/57627835373.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/7708082089.pdfIn PDF document text
    • http://vukenebavez.rf.gd/ich_harmonised_tripartite_guideline_q7.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/e_aadhaar_csc.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_off0000d8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D3 5240 bytes
SHA-256: c3372ca989bb5040bf697429af103fed07d2f478ce51af08ae022c365729953b
font_01_sfnt_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 11808 bytes
SHA-256: 73fd4abf35f3a16656a12974f0c33c3d2d1acd9637fc88fcc5e925e6e84a2ee6