Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d89f3447e80de09…

MALICIOUS

PDF

67.2 KB Created: 2020-11-18 03:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6f124414997a0077e383e7108de9e741 SHA-1: bd1644fd68696186e19cc28f48e5576609b10f90 SHA-256: 1d89f3447e80de098f9f7cff404ed99c32803c2acea2620480004f082bef6786
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded URLs, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of malicious links and the ClamAV detection indicate a high likelihood of this document being used to redirect users to harmful sites, potentially for malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=michel+foucault+historia+de+la+sexualidad+resumen In PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/kixebegizotiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473445/normal_5fa83e5d96d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fa6ee1f39411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_5fb29b4e0f53a.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/9813129.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/mosabiwinuvor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fad83e145db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f92457431278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f9b5b206f1c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f8fd485ad982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29dcc0e5-5990-4442-8a0b-14a333668ede/43337668817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9fda27-405d-4a02-9537-b22a55b3ef02/apkpure_google_play_services_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd8084a-d963-4e91-8b4f-4250947323e3/xogufukixixisa.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_off0000cbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEE 5336 bytes
SHA-256: 1b04004b759f72974c4bec256b117b483cad3c1fddc25ac52c9b5487892a37bf
font_01_sfnt_off0000ddfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFB 9752 bytes
SHA-256: 3ee9824a0f180501af757929ead24cb4266bd51e8fb265628044c43273040d19

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