Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6964a30f613782d…

MALICIOUS

PDF

69.8 KB Created: 2020-12-20 10:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bc07b8331961c6f4e2c4502d77badc8a SHA-1: 121c544f260509a02c01085756a1ff5ac8371775 SHA-256: a6964a30f613782d3ad3627bda09ee576790c9af94ddfebc0fd7536c6d5cf1e8
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm, indicating a likely intent to distribute spam or phishing content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous external links, including one pointing to known malicious infrastructure, suggests a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/strik?utm_term=no+fear+shakespeare+a+midsummer+night%2527s+dream+act+2+scene+1 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4406229/normal_5fc5ea6617499.pdfIn PDF document text
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/subefanuzawuzolofofu.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/loruda_renewosuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5f9f2a42cdd7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388617/normal_5fc44de8c2c34.pdfIn PDF document text
    • https://vokozigaga.weebly.com/uploads/1/3/4/3/134316184/2832039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5f9b08183ce16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f879d3b350f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5fd6c97830801.pdfIn PDF document text
    • https://lajawenofuki.weebly.com/uploads/1/3/4/5/134501859/tirepupili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5fdaedbf36453.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc17c913dfdd95b60d93bb6/t/5fc5c443eaf37e3b64642480/1606796364636/wt_white_high_school_staff.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc299eea879396864131e05/t/5fc7368c48d5672cfb3a94e2/1606891150033/myaviva_health_insurance.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2b976394b41d6424bdfb/t/5fdd9794fb7de13a6446c6b9/1608357781250/xalazokunaderifaw.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_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 5788 bytes
SHA-256: 8acd181d6dd4ba055c4b0dbce068b3fd190efbda56f0a9712f7fbfc118b3557e
font_01_sfnt_off0000e78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78A 10396 bytes
SHA-256: f59e22f16fe72645f7d239e7b3a3530d445f4326995866fac9def592554656ff

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