Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bd148ca99276eb…

MALICIOUS

PDF

75.3 KB Created: 2021-02-20 16:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5b2df1c8f7e32ffc4cae605090858972 SHA-1: aa926f1c45b1e9a8f5abe33911fcd6f920c8922b SHA-256: e8bd148ca99276eb81dcde5da3276391de4efcf7d5bb6aa7575d5a162a303314
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://bologen.ru/wix?keyword=beginning+band+note+name+worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4504047/normal_6022d8453735c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fce62bf33593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366984/normal_5fc5cebe18a8e.pdfIn PDF document text
    • http://kiduzat.iblogger.org/figita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420459/normal_5fd256339337a.pdfIn PDF document text
    • https://nijusalelazi.weebly.com/uploads/1/3/4/8/134875584/7ce8218.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bubexixan.epizy.com/52190409714.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/xewomil.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/orange_crepe_paper_sheets.pdfIn PDF document text
    • http://kusabisaridiza.rf.gd/87828127137.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/hach_dr_850_colorimeter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/89099968102.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/rassembler_plusieurs_fichiers_en_1_seul.pdfIn PDF document text
    • http://lijezuzoxej.epizy.com/is_ccna_difficult.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/executive_summary_closing_the_gap_report.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_off0000e9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 5552 bytes
SHA-256: c0c4141024fc6669b863a7658e2816a4a4e2f68c25ee68c803476ca5e6e4e4b8
font_01_sfnt_off0000fc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6B 10440 bytes
SHA-256: e72e598b01278b1487aa1db5fd11d5acf970ffb8da7071369085d550a2230ec1