Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f1d93852833389…

MALICIOUS

PDF

69.5 KB Created: 2020-11-06 06:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 19a158e0a3794c2f9a79ea4a2f8ae8a7 SHA-1: db941f15b8ae9dcd298e7c8e567e5854c7f37ca8 SHA-256: 05f1d938528333896bd4b3fe580e5451e0e0d65b2240db3c8464ef4405af3486
96 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffnew.ru/strik?keyword=the+black+cauldron+book+disney PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8964604e89d.pdfIn PDF document text
    • https://mawanegofarate.weebly.com/uploads/1/3/4/4/134466522/7315944.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/sezebepit/22461644382.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/mathematical_analysis_for_business_and_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/jitinutevomofipisexilan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f4f4f9-c37d-4e0f-9251-8bb5db7b1a7e/zigexezodaposuzenik.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/bodirunamipoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/anterior_knee_pain_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e62030-5442-4bee-a7a4-b403515658db/72491991811.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/chapter_1_the_human_body_an_orientation_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7768a32-3207-4996-a2ba-af0d6b22113b/google_site_gadgets.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/writing_topics_for_ielts_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37b8108-a823-46be-a4ac-99e8705f41af/widav.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_off0000d1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B2 5284 bytes
SHA-256: f1dd200b8272a5b59a0f3667bc7bdd7fb83784dd4d0236b908e3e504c2d32f54
font_01_sfnt_off0000e3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 11104 bytes
SHA-256: 5d082896c1c328e9b7652e9ca3d5da6d4e814a7eb5ed6c3cec16e9d1350378ca