Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3bdb7ddf747c2f…

MALICIOUS

PDF

42.5 KB Created: 2020-11-01 06:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 203914d36510f3093aae4a36da1030f9 SHA-1: 92416cb3dbe24bb29b2768cacaf6065766a22276 SHA-256: fb3bdb7ddf747c2fcd430c5ae26789bcf9bfafc8d885f0d87b084100f1647f32
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to 'homogeneous mixture concrete' and the malicious URL, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/pify?keyword=example+of+a+homogeneous+mixture+concrete In PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/95b6149c.pdfIn PDF document text
    • https://farukipem.weebly.com/uploads/1/3/4/4/134473356/0436193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_5f9911690874a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0312/4375/files/atlas_de_anatomia_dental_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b9df06-9962-4bb4-be04-bd99cdb5d5d0/62501749856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddba8ef6-f15d-4736-80d9-d2eaa0ccb470/tuxusixofifeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1626/5117/files/75913856530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6b76d3-1484-4e8f-b4e2-6b412977d28b/vunubor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1604/9607/files/tell_her_no.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2291/6000/files/clinical_kinesiology_and_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8d0775-555f-4c60-938d-11a4972df283/physical_therapy_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/vefamurite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ab5efe-23bb-479e-b136-e9d8a8a84153/83102738929.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_off00006673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6673 5452 bytes
SHA-256: 4873a676b49b33885c55293f64202090e8b09d8cc86fe42852b49f4a3e92e6f9
font_01_sfnt_off000078e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E7 10556 bytes
SHA-256: 54095e6f646553081c50c73191bb34c2d48e47d4a10b900c0d740002f42765a3