Malicious PDF — malware analysis report

Static analysis result for SHA-256 1181d2a5dcb466c7…

MALICIOUS

PDF

71.0 KB Created: 2021-03-03 20:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 660731f72700ee96675c418f33e0f97a SHA-1: ce3fa541fe1276b14ed66a624947ee11fa31b596 SHA-256: 1181d2a5dcb466c70f99b88f24a1f160d55d3f90c4d5bdebe1472cec832fc384
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/wix?keyword=poultry+feed+formulation+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408875/normal_5ffb1398ccf51.pdfIn PDF document text
    • http://revershjtb.site/como_instalar_dreamweavermqav5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474979/normal_5fca8df42ab31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_5fd7ac1bf3c28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_601143615432c.pdfIn PDF document text
    • http://003-center.ru/906592671932xlix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_6029b602327a0.pdfIn PDF document text
    • https://malizopal.weebly.com/uploads/1/3/5/9/135962708/bazen-famajer-lovipulekefevob-nemimukijow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_60177ba1ea148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_6013b31555c46.pdfIn PDF document text
    • http://instapodarok365.site/what_are_effective_communication_skills_in_healthcareh3iii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_5fd1367a817df.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/1LlKUBL/infinite_flight_simulator_apk_data_revdl.pdfIn PDF document text
    • https://jotogenawe.weebly.com/uploads/1/3/1/4/131406354/551e2a9.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_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 5316 bytes
SHA-256: 0e29cfc0b77300f070ecdc47d93ad101f98ffb44c4d33edf9d40af5e0fdf0117
font_01_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 10228 bytes
SHA-256: 3cc10dff4a19c0ce8c64aefb7c38713f3e3ccb5c8ddb36ec8ff33a3bc8e8ca79