Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb2855e076c7c4d…

MALICIOUS

PDF

46.0 KB Created: 2020-10-05 17:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1371c1be2cf4a6200da1161279fe01ee SHA-1: fa0eb8b9c743ff9b96a6158825f4bdbad2369a86 SHA-256: feb2855e076c7c4dc82cf51dea1ea546a57965c8d4768ba89a01ee2e08f61c09
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is a common tactic for phishing or malware distribution. The document body, though partially corrupted, includes text related to 'Fiba rules in basketball' and the malicious URL, suggesting a lure to entice users to click the link. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/strik?keyword=fiba+rules+in+basketball In PDF document text
    • https://site-1038437.mozfiles.com/files/1038437/81075459439.pdfIn PDF document text
    • https://site-1036864.mozfiles.com/files/1036864/rigakir.pdfIn PDF document text
    • http://files.thecaravanningbikiechic.com/uploads/1/3/2/7/132710683/lafizike.pdfIn PDF document text
    • http://files.elimpetaluma.org/uploads/1/3/1/3/131398559/fdcdc961.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/786f5c38-4278-4b9c-aaaa-3242a5150ea8/87713915079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cdcdfaf-7af0-4c0b-aff1-1383f7e5101e/75306714311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e3b72d-b1e1-4157-9d7b-02b3133ca1a3/pilusapamidilebafex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0536a94c-28ec-463d-b9f3-33e7cb1d05a3/gipemegebiviluzugibota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e10f9b9-888e-4a85-bc1d-c2977a45eda4/rupobodulasojera.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_off0000780a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 4840 bytes
SHA-256: 4fd1892be61c1341a06099a80bc1dd5c0f5aad5e9436e98234822fac60282488
font_01_sfnt_off0000888d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888D 10664 bytes
SHA-256: aedb85e87b569671ecc279d834e49116ecdaa81b3e6453adb1ed540a423ae39f