Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8347e080aed22c…

MALICIOUS

PDF

34.4 KB Created: 2020-10-07 12:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8741dfa27c5b0182bf07d2324d6bfc68 SHA-1: 0fd2953239f80f01fa94a5181e7f2adb9c2cfbf0 SHA-256: 7b8347e080aed22c394313eaa2fac1c1e2a4a5b52c075b3fab17d11a93156baa
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=artforms+11th+edition+free In PDF document text
    • https://site-1042504.mozfiles.com/files/1042504/wumunokolinurinorixaje.pdfIn PDF document text
    • https://site-1039886.mozfiles.com/files/1039886/50955114416.pdfIn PDF document text
    • https://site-1042511.mozfiles.com/files/1042511/32336473401.pdfIn PDF document text
    • http://files.englishformedicine.net/uploads/1/3/1/6/131637302/9415815.pdfIn PDF document text
    • http://files.phdoodlesco.com/uploads/1/3/0/8/130874183/16d77fe.pdfIn PDF document text
    • http://files.cottontailcottage.org/uploads/1/3/1/4/131453521/a2f56f.pdfIn PDF document text
    • http://jawawasa.bottlemockup.com/uploads/1/3/1/4/131437490/bc94cc.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/34a3a2f7-5299-49ef-a5ef-9bb85ddec98f/bufaterenirajuvajalujupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e742c7-280e-4756-bd60-9bf106de38e6/80676455413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e2b424-c7a3-473f-9446-338c491c2906/nerab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8e7240-5fc7-4cbb-9c99-e03168ce2ce3/vakurizasal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ca315a-a981-4eb0-a065-26bb52685683/suzeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/72152688835.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_off00004970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4970 4944 bytes
SHA-256: 53ab5d98636c9d62bb566fc1d3a3220666944d8d8b87720202d0349a97c80b1b
font_01_sfnt_off00005a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1E 10272 bytes
SHA-256: 518d06e14b9744e00720e2c351dfcad26e3e953962014cb9d4d91dcdce5452fb