Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2e25a66b3b5e45…

MALICIOUS

PDF

81.9 KB Created: 2021-01-21 04:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9eb9a44844d8792c44eaa3aaf0b0c635 SHA-1: d876712fd343ad1eb7f871f5b177887024ae9196 SHA-256: 1c2e25a66b3b5e457ca9e9f2179dadedf0373c62266d2c08fcbe03eaebf63092
254 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
  • 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/wb?keyword=tone%20generator%20freeware In PDF document text
    • http://ferobuxanax.iblogger.org/1902372377.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457279/normal_5fca9afd4440f.pdfIn PDF document text
    • https://site-1174586.mozfiles.com/files/1174586/mirror_by_lululemon_cost.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/fuliki_momasofarisojar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_5fb273b0eb898.pdfIn PDF document text
    • https://weranatowo.weebly.com/uploads/1/3/1/4/131408071/df7c73ee84e87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469136/normal_6004014103656.pdfIn PDF document text
    • https://wizujepubenepax.weebly.com/uploads/1/3/5/3/135317151/cca97.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/luropi/web_development_course_outline.pdfIn PDF document text
    • http://suwojubomitela.epizy.com/17100311952.pdfIn PDF document text
    • http://timavutiziv.epizy.com/steiner_cephalometric_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/principles_of_antibiotic_therapy.pdfIn PDF document text
    • http://sodarag.epizy.com/39435737657.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/vonexuxekekegegunamurekej.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/16541758619.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_off0001047e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047E 4764 bytes
SHA-256: 29a11c34cb1ba70f201ca337ecd15fd621dc550e40dbc7ffefb2774155736386
font_01_sfnt_off000114da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DA 11200 bytes
SHA-256: 3556461d9abd67d6da91bdad7944a7d45a7b49173322a569fc271d35fcb69003