Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4c140eb54002d2…

MALICIOUS

PDF

79.8 KB Created: 2021-02-09 16:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6e096189e82fe6e86f16b2609e46ce54 SHA-1: 3b4eacb5099d2bc84a9e120913c603b484d7c602 SHA-256: 2e4c140eb54002d28f8012ce9abdc133ffc3d8a0d41ecb1cf2ce3814a755983c
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm used for SEO poisoning or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/wb?keyword=inspection%20report%20pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480145/normal_5fcae6d4366be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_6009f3a586765.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/c4a659c47d3b5b6.pdfIn PDF document text
    • https://toroxamaje.weebly.com/uploads/1/3/4/0/134017611/7499738.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486772/normal_5fc9cc667dc91.pdfIn PDF document text
    • https://vusejamujaled.weebly.com/uploads/1/3/1/4/131437056/wewimarokanemexake.pdfIn PDF document text
    • https://sitekitenuzuvi.weebly.com/uploads/1/3/2/3/132303150/997a73079.pdfIn PDF document text
    • https://mibamubotasuzat.weebly.com/uploads/1/3/1/3/131381640/4057586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_600ba64c769ce.pdfIn PDF document text
    • https://kobamewimituk.weebly.com/uploads/1/3/1/6/131606733/62fb67a6a9e3.pdfIn PDF document text
    • http://wiwafapudipib.iblogger.org/puzzle_games_for_android_2._3._5.pdfIn PDF document text
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/negiminapujitaj.pdfIn PDF document text
    • https://misikozi.weebly.com/uploads/1/3/4/4/134443183/dcc3cd5a.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/xenavuxa/baperovazefizekup.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/fraction_printable_worksheets_for_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/44241600483.pdfIn PDF document text
    • http://tapopopabe.rf.gd/workbook_and_worksheet_object_in_excel_vba.pdfIn PDF document text
    • http://gobaligene.epizy.com/leystone_armor_achievement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/vba_excel_2016_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/26684170270.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/87595171336.pdfIn PDF document text
    • http://palomidifigur.epizy.com/brushing_your_teeth_worksheets_elementary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE17 4632 bytes
SHA-256: 1c9669861a279d1a0a205fa29c67232ef4dd8110db248492947607e2481d27eb
font_01_sfnt_off0000fdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD4 10996 bytes
SHA-256: 1fb3b36fa506c239d27d35b50ed49534f51a70318694547140ea0d470d7c0bb1
font_02_sfnt_off00012341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12341 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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