Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4c5db4b477a1dc…

MALICIOUS

PDF

38.5 KB Created: 2020-11-04 06:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 46d8926692f7f46a5990065467602bc4 SHA-1: c71d9fc2a31c62a98e8ee24c9b245121377e772a SHA-256: be4c5db4b477a1dc20ef0169396837b9792efd23c8e72762d41aef9cd97b0235
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or phishing attempt, aiming to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.link/123?keyword=joe+fidas+notary+washington+pa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403940/normal_5f94fb0a76464.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/ad4f0324.pdfIn PDF document text
    • https://lisunudutiz.weebly.com/uploads/1/3/4/5/134530231/gigonunibuka-juxalunuraj-wavogerugazojog-pujugedomal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_5f8d44aa429a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f893d7962bce.pdfIn PDF document text
    • https://funiwulew.weebly.com/uploads/1/3/2/8/132814073/4454659.pdfIn PDF document text
    • https://rawofaweka.weebly.com/uploads/1/3/0/7/130775842/5502308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5f9f0344eae6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5f96bf0206869.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/wanasuvedigo/free_au_and_aw_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/naruki.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/movimiento_parabolico_de_caida_libre.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/pifawab.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/jesus_te_llama_devocional.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_off00005673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5673 5456 bytes
SHA-256: 7dca46d680e37a8868c5f204c512f9824ac80177267f386d9b4eb28d78a496b5
font_01_sfnt_off00006918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6918 10396 bytes
SHA-256: f2ae008628f00df25b3818e629fec4c8f7b6af5fbd0545156ebb7e45afb1a7be

Open this report in the interactive analyzer, or submit your own file for analysis.