Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e62b1a135a8a95…

MALICIOUS

PDF

41.8 KB Created: 2020-10-11 16:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 45ae1be8ba0faf5bf6437d9802ebd5c5 SHA-1: 76ab967d4819f15e0ba9f9b4082743a5dfd55f8f SHA-256: 39e62b1a135a8a95ede6923d4c1d5dfba298c065661396d7598bd50e5c5d1bb4
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://cctraff.ru/strik?keyword=crab+legs+in+las+vegas In PDF document text
    • http://beripisok.serifsandshutters.com/uploads/1/3/0/7/130738623/lowuwipere-kitipojobavum-pigakozetij.pdfIn PDF document text
    • http://files.reptibel.net/uploads/1/3/2/6/132695741/6645c55896cbb.pdfIn PDF document text
    • http://mezas.sachinchitta.org/uploads/1/3/2/7/132741100/tibujogu.pdfIn PDF document text
    • http://files.faspaints.com/uploads/1/3/1/8/131857695/4fd37dc7dc0c.pdfIn PDF document text
    • http://nomuse.columbuspetrescue.com/uploads/1/3/0/9/130969573/lowakowizu_mavapoda_galetigudarurin.pdfIn PDF document text
    • https://site-1039161.mozfiles.com/files/1039161/fokugexenoxuwejab.pdfIn PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/fifomevutuwulolit.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/jipopok.pdfIn PDF document text
    • https://site-1043752.mozfiles.com/files/1043752/88029621132.pdfIn PDF document text
    • https://site-1043767.mozfiles.com/files/1043767/74063292348.pdfIn PDF document text
    • https://site-1036625.mozfiles.com/files/1036625/12456021479.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7497/2567/files/zaporodexiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/39291443109.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_off00006640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6640 4960 bytes
SHA-256: bf153fcd3a6f96ede63f553efa062d765d8ff67c360a2cea6454587af6bc61f4
font_01_sfnt_off00007737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7737 10352 bytes
SHA-256: 2006015ee63a395282e4057330ef7568da8b231593d3e17f57285c4bd82d7a78