Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4a2ef0a7db5ed0…

MALICIOUS

PDF

45.5 KB Created: 2020-10-16 05:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2a7c0b2457e1c599336e72cd80f6148a SHA-1: eb50f92ba8f350a83de5b11f8ac3bffc8dbeb446 SHA-256: 6e4a2ef0a7db5ed0b099a5e9db1c979c315a36c65531b22cfbdb17ebf68c49c4
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/123?keyword=coleman+pool+filter+instructions In PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/3f7bdb1fc.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/8536469.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/nesubine.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/tusuze_xidexiwu_vovasuzelusas_kibop.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/d707d788a78.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/556086.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/daxasolizi.pdfIn PDF document text
    • https://site-1039549.mozfiles.com/files/1039549/73861491518.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/14495228103.pdfIn PDF document text
    • https://site-1044108.mozfiles.com/files/1044108/gafolafofitisusulurifipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8723ca40ad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f88cb71011db.pdfIn PDF document text
    • https://site-1043447.mozfiles.com/files/1043447/70569611087.pdfIn PDF document text
    • https://site-1044108.mozfiles.com/files/1044108/80912124502.pdfIn PDF document text
    • https://site-1039313.mozfiles.com/files/1039313/libekobuvujabalog.pdfIn PDF document text
    • https://site-1039775.mozfiles.com/files/1039775/dejunexivevokaxixek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7366 5064 bytes
SHA-256: 07b6c541ff9744578d562730c5f9a112333ae9f8cfd7e8cf4cd5f6cb57854b7c
font_01_sfnt_off00008485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8485 10668 bytes
SHA-256: 87fc5c6cf8ab338094ed505b14737b9b36715929e73d086b1d30a39b9dff3306

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