Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c47f9c03a036829…

MALICIOUS

PDF

68.6 KB Created: 2021-02-21 16:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b546589dbff76b103f1b1585817ec40e SHA-1: d83d700d827908c6de820636f052b93a3a5a2d80 SHA-256: 8c47f9c03a0368291300fbe00b91c4514c43c8772ae3c0316ea0f88c5751cfab
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wb?keyword=serato%20dj%20software%20free%20download%20for%20windows PDF link annotation
    • http://devajusogav.22web.org/23836874057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403259/normal_602905439c51e.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/gchhU9A/marlboro_ice_blast_australia_mg.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/hi0jbic/23121612730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373522/normal_5fe5fcc54e9bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_5fdbeca90a31d.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/dotulapasul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497071/normal_5ff407c2d5803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367297/normal_60095b5ae43e7.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/mojojugotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_6017db4384e8a.pdfIn PDF document text
    • http://petajofap.22web.org/lumalowopupeve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_5fdc5372f1244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tepuxasimu.rf.gd/zowuxunu.pdfIn PDF document text
    • http://gobusef.rf.gd/kakooma_addition_worksheets.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_off0000cff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF4 5172 bytes
SHA-256: 49a95b0df4c8ee45c962e6ec54688419ac25e16a4d05e13a8c0cf0694d397da0
font_01_sfnt_off0000e1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A8 10468 bytes
SHA-256: 94cccf5325f31a16601087b9a3692e46210cb18209917fd38189c2700929f0ee