Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef1f75880a296a7…

MALICIOUS

PDF

41.3 KB Created: 2020-10-29 21:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9d3e0df74dc1f57f91fe0ed19001594c SHA-1: e6e184ba9f0ba6d2da1550229b0f673d3c9a2c31 SHA-256: fef1f75880a296a7cfa5587ecfa8bf21084c0efa30f47226d6c6eeb3679c0f99
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and multiple URLs, suggesting an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

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.cc/123?keyword=rudy+can%2527t+fail+tab In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_5f928ecddf227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f90807d7aedd.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/6dad58ab.pdfIn PDF document text
    • https://telisawe.weebly.com/uploads/1/3/4/4/134466193/f13c0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f8a2a46bd4f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f8750164e8d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f2d145a0-769c-40a2-91f2-977475114b99/woketemewog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3b14d7-71b8-49f7-8549-6ec8bdd9067d/kikufenusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8138/2046/files/donatarias_autorizadas_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B6 4676 bytes
SHA-256: 5f3d99ba364b09f49716556292c4229d370e7d5f8b49a36f8921524e45b03aba
font_01_sfnt_off000063b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B2 12200 bytes
SHA-256: fb5f235e44552e48d292f6c683386aa0a9ae1fa959fe582c172e964e0d8e864f
font_02_sfnt_off00008aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AED 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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