Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2aaeac879c7477…

MALICIOUS

PDF

72.3 KB Created: 2021-02-15 09:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 47651af423999b84a07bbc8e7e4edeea SHA-1: 7538ccfb4ca6445d3929d74334e608d9678204e3 SHA-256: 8e2aaeac879c7477b1e47b30fcc30ee0df84a50102caac6c5d86f0447d6bdba9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on external domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=boss+fighting+simulator+codes+for+runes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5fcfe8167f09e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505771/normal_5fe1cb5435752.pdfIn PDF document text
    • http://wavikedinufefe.iblogger.org/tongue_laceration_repair_guidelines.pdfIn PDF document text
    • https://mezufimuvuleto.weebly.com/uploads/1/3/4/0/134016906/pogoxurexuweke_nebaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_5fe679c3f0bba.pdfIn PDF document text
    • http://zoosalon.org/darkest_dungeon_modding_guide6si2n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465262/normal_5fc7776fe43b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_600e955357f24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_6020d5520e4fd.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/kibobew_wozisigejogiz_zesevojok_xeludabikanopel.pdfIn PDF document text
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/8e1e1f7b02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387226/normal_5fc8f1fda035d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500453/normal_5fdadf3064681.pdfIn PDF document text
    • http://cmbclientes.com/77330137388vd64b.pdfIn PDF document text
    • http://lastasked.com/6627058615370s87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://semerobaragizeg.epizy.com/48679851432.pdfIn PDF document text
    • http://nekogepi.epizy.com/actors_cv_template_uk.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_off0000db38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB38 5484 bytes
SHA-256: 20665939f265c20b114cb7992bfdbd2a6c271c9e08937ee4a014ffb07ffc682b
font_01_sfnt_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 11264 bytes
SHA-256: 5748129757ea845e5d953acc303c59569950dc64cf089aa48001dd030eb49ffb

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