Malicious PDF — malware analysis report

Static analysis result for SHA-256 919daf5c8526b983…

MALICIOUS

PDF

61.2 KB Created: 2021-02-10 17:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5fc3c12ea5cbe6c91fea849a32ef5a65 SHA-1: 8c28864dff2fdac376e170fbaa6d1ecc67ce1f0f SHA-256: 919daf5c8526b983c5a3e2ed147754b3e7213da6d50a022442e89a805b50114a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wb?keyword=farmington%20hills%20police%20accident%20reports In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_6017c31221e4b.pdfIn PDF document text
    • http://tajeromodovo.66ghz.com/bay_dardi_drama_ost_audio.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/zewugidaluzu-jefizeraf-vinazo-kagaz.pdfIn PDF document text
    • http://gunepevoxop.66ghz.com/crafting_guide_ff14_5._0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455370/normal_5fda97e210bb4.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/nuwusaxutuputuregimu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_6018c6e30f387.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/sujulopomuz.pdfIn PDF document text
    • https://juzajepilokak.weebly.com/uploads/1/3/4/6/134682244/dfa08.pdfIn PDF document text
    • https://boduburul.weebly.com/uploads/1/3/4/6/134654649/4871053.pdfIn PDF document text
    • https://figuzejigof.weebly.com/uploads/1/3/4/6/134644002/fesubezadi.pdfIn PDF document text
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/videmawoxut-jepinumipujoxe-japeparaxiri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380228/normal_6000017c29646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470696/normal_5fd63f1669cb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481667/normal_5ff8f99b67748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403556/normal_5fee0154dcd5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rirovaxodebola.rf.gd/48143914511.pdfIn PDF document text
    • http://salalew.epizy.com/zexinoberoguxigifat.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_off0000b511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB511 5444 bytes
SHA-256: d3c78380ea54bf816c0a3d5e7a4637f607be3f351d690c52b4277d0d1a043523
font_01_sfnt_off0000c76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76B 9396 bytes
SHA-256: 78d2e8af4ccd10ce72c424a9e3ee9d9e272ac4ec6c12790f2e4d7e6f21a0006b