Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4860d2a16aedb42…

MALICIOUS

PDF

44.8 KB Created: 2020-10-29 09:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d41aeff47673bd1914375ff9bfbaa824 SHA-1: 5916402f05ccb42a756df590ebae6b97ba02be65 SHA-256: a4860d2a16aedb4261ef3d84593c8d6727337e5abb10ef88c34058c022f75322
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/aws?keyword=pheasant+lane+mall+jewelry+stores In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f93fe9e11375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f8dbd698f66a.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/3926153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5f911bcab5382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f89e9b836048.pdfIn PDF document text
    • https://mebogizudoredo.weebly.com/uploads/1/3/4/4/134472702/9243211.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/xipabedoxu_winirumuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5f96f0095b1c0.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f92304716719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f8b7e6ca5d2f.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/c472f401b85e2.pdfIn PDF document text
    • https://wunimebi.weebly.com/uploads/1/3/4/3/134361225/fetejurifu_wikuti_xotelabirasu_takitibuvezeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zetare/novel_andrea_hirata_sirkus_pohon.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/20985095031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/assembler_directives_in_8086.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/gorham_sterling_patterns_1950s.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/osrs_crafting_guide_p2p_profit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6417/6021/files/muruvobabekuradizefe.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_off00006dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 5196 bytes
SHA-256: 2cf8148d45d4d199cad9341d300e86779ebe18dbeec4042a4ec652432ccfcc29
font_01_sfnt_off00007f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 11440 bytes
SHA-256: 0479fd1696249368cc1288c07d329e4e5abd37bb52394a064451599f1e5edfad

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