Malicious PDF — malware analysis report

Static analysis result for SHA-256 4349b7c6af7617ee…

MALICIOUS

PDF

42.8 KB Created: 2020-10-09 02:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c2a578838dc60ec543b74d1eb8fe6a60 SHA-1: 78e7e2804b94cb8c550a697ecfa59411cfdb4250 SHA-256: 4349b7c6af7617eedb417adf25a584bc31e0f80b102b8311a343f8796f7c0d62
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=endless+legend+best+faction+for+beginners In PDF document text
    • http://files.redemptionccgfl.com/uploads/1/3/2/6/132681969/3418556.pdfIn PDF document text
    • http://demil.currie-regenerationlab.com/uploads/1/3/1/3/131398064/10945df5.pdfIn PDF document text
    • http://files.aunaturalqueen.com/uploads/1/3/1/4/131437119/livejakirozu_petejawuvob_jegologuba_xajunuvem.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/5285581653.pdfIn PDF document text
    • https://site-1038927.mozfiles.com/files/1038927/jujidatoriperaka.pdfIn PDF document text
    • https://site-1038360.mozfiles.com/files/1038360/satenowipow.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/839f9db4-fd85-4335-964d-7c419d89ef68/52570567837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c12db0-f8e9-470e-a576-52d5fb2fb5c6/betomagujesukixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/sally_hansen_nail_polish_strips_discontinued.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9849/9997/files/xoteviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0957/9429/files/zabarizagavuzujoji.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_off00006899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 5284 bytes
SHA-256: b99e385ba2f6ddc2201334b6859bb0cacd9335c3866d0936c7a8c490f471e4cb
font_01_sfnt_off00007aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA5 11028 bytes
SHA-256: abba0e6f0d1a8217e70314af9fe22a8c1936e9a67f2d9c2d05fcc77397ed95ff