Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb96bd68b5ada147…

MALICIOUS

PDF

87.0 KB Created: 2020-12-18 01:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 99b0cefe02c039cd29c2d076ae591288 SHA-1: 174af5a2142390fdbf6295436a5b7a64c406b23e SHA-256: eb96bd68b5ada147b094e6420b537cb9eded0a37b71110e63b31f3c3f4b7beda
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffmen.ru/strik?utm_term=fnaf+world+download+unblocked+at+school In PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/2941514f.pdfIn PDF document text
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/629019.pdfIn PDF document text
    • https://rewazifepa.weebly.com/uploads/1/3/4/6/134664269/tedibabulad.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/zolilodugadun-tasiwutakul-wewajiwonin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/varolexexus/xomipoxavarenuxevigap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021ab099-8f06-4119-b8f1-4f417441415a/penulamufaburibavixur.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/search_associates_reference_form.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/gastroenteritis_treatment_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/hsc_result_marksheet_2019_jessore_board.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/firefox_esr_68._0._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e60b75-9d10-46a7-bdcf-8aef1b37f2af/vavuzafirenenas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccf2adb-7819-4a40-bf41-3c370beae7ae/mikawovuvejikiwuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051c0c0b-2e18-4d62-adcb-72fb78464d09/axiomas_metodo_deductivo.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/xesis.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 4428 bytes
SHA-256: 8b4c36f559ad59741a4dbe7fef4b849ac27fb36108e4f769f58753d7fab3a8ed
font_01_sfnt_off00010757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10757 5192 bytes
SHA-256: da44a49e1decb96f6c63c9cf903ca1dc33ea6b75a7ee7c7021eec40073e16245
font_02_sfnt_off0001190b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 11448 bytes
SHA-256: 25fc838a170d06b64b9fa9e571a82b4a9d96e2bd6bcd270c507bdf7fb2cb0046
font_03_sfnt_off0001400c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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