Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92f2b22735ba195…

MALICIOUS

PDF

43.5 KB Created: 2020-10-05 07:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f70b5411f10237b21d4dcd99c1f6dcd6 SHA-1: 71fd69c05d619882c4e2837bfd28cb5a2062e5ff SHA-256: e92f2b22735ba1958a0e022fb3e5d561a8799855fcd0d25290119d51b2866803
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=zte+axon+7+mini+update+android+8 In PDF document text
    • https://site-1038835.mozfiles.com/files/1038835/fafojerirezoditomafafide.pdfIn PDF document text
    • https://site-1038728.mozfiles.com/files/1038728/71427226489.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/78015150466.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/53798504200.pdfIn PDF document text
    • http://files.labsofdemocracy.org/uploads/1/3/1/6/131606123/6505209.pdfIn PDF document text
    • http://files.njliupdate.com/uploads/1/3/2/6/132682048/polog-sakove.pdfIn PDF document text
    • http://dixopazi.thebigquincebooknook.com/uploads/1/3/0/8/130814328/9489b21ff352b0.pdfIn PDF document text
    • http://files.alexiajazz.com/uploads/1/3/1/4/131438538/6ccd53.pdfIn PDF document text
    • https://site-1038614.mozfiles.com/files/1038614/kesubobagigibomagimajaj.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/wuluxafakixowigakive.pdfIn PDF document text
    • https://site-1038691.mozfiles.com/files/1038691/11741406446.pdfIn PDF document text
    • https://site-1039382.mozfiles.com/files/1039382/wetojefomirokijake.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/pafibefagelapuminodib.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/1/0437/1621/4939/files/73407673491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/8850/4741/files/king_and_queen_crown_promise_rings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/vebuzazulizumovux.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_off000060e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 5196 bytes
SHA-256: a7d3a84e83e1ae0f1ff812bfba00f3697d4e4764469de70a24d8a3ee0c7e0fec
font_01_sfnt_off00007286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7286 14680 bytes
SHA-256: 0e5a7df467faf865753e124dc80c6c90cd366a5817fe7c46ad8992b13ba67e1c