Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8cdb7436fc64a3…

MALICIOUS

PDF

71.5 KB Created: 2021-02-27 11:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 170953f9181730e7a22c1c237c8d5cd3 SHA-1: 67d6cbf61a4051256153568650a0b1e1b772ca3c SHA-256: fc8cdb7436fc64a3612276299c5e0e5f63b5d08834d2989c128b427d6477fd7b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/award?keyword=moto+g6+play+case+otterbox PDF link annotation
    • https://cdn.sqhk.co/ramawuvade/iijJjgp/madoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452400/normal_5ff271dfdc532.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455660/normal_6001920e37af8.pdfIn PDF document text
    • https://kuwiliwal.weebly.com/uploads/1/3/1/3/131378779/5330724.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403556/normal_5ffed3319ba54.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/sujexujevudekuv-nuzija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_6026cdee3e2fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fd04ac44023c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370307/normal_5fea248406f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5fe9a913c7daa.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/2358020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_602cf6ed464e8.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/jewizopukuni/fusen.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/contoh_soal_siklus_akuntansi_perusahaan_jasa.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/ipl_2019_match_schedule_time_table.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/aeroporto_de_guarulhos_telefone_informaes_anvisa.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_off0000d759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD759 5568 bytes
SHA-256: a1d20f06079cd5a6d360a03a9f9117a30332b3eaa2583bc00a37fc5e32a7d757
font_01_sfnt_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 11052 bytes
SHA-256: 88f5e9bb97c59c15bc78526f83f90e834a415018ff0f9ebe3ff3a1362abdd64b