Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b5721dd7272a8d…

MALICIOUS

PDF

73.4 KB Created: 2021-02-18 08:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 80f0963ecc1f96b8fb53660eac2797aa SHA-1: 2bfb985e3abb81b3230019fbb5803df3693dd578 SHA-256: 89b5721dd7272a8d7b31f814af06efbde7f7e080661df7d33dcd81ff063a435a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, identified as a PDF link farm, suggests a phishing or SEO manipulation attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=george+foreman+rapid+grill+hamburger+cook+time PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383807/normal_5ffda96152522.pdfIn PDF document text
    • http://cethq.xyz/25394512468le0qw.pdfIn PDF document text
    • http://olimp-home.com/kendo_chart_categoryaxis_templatekjhuh.pdfIn PDF document text
    • https://wetebofi.weebly.com/uploads/1/3/1/6/131608016/34a0b24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_5fe91e5b56cfb.pdfIn PDF document text
    • http://mantenancie.com/47073994214fm113.pdfIn PDF document text
    • http://wisitens.online/dozerolakavikolijabzgpb.pdfIn PDF document text
    • https://kibowoje.weebly.com/uploads/1/3/0/7/130775027/5611044.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/5342970.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/sizufa_zubefef_xupenidori.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/jupevuxirapi/35107646601.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/help_informtica_mogi_das_cruzes_sp.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/videoshow_pro_apk_without_watermark.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/kurejo.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_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 5628 bytes
SHA-256: 674b556124c3e965b6b19ee1667e7baa70cb84a0c8d4f1a6fe8b195c21cc07ca
font_01_sfnt_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 10612 bytes
SHA-256: ce8ada41dd3e54c5bd29b3d88368d3ae49af3295f3d785fc67c965c7178ecbcd

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