Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5982a8940666c9…

MALICIOUS

PDF

42.6 KB Created: 2020-10-08 11:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ef9062d02b10d8069cb54fdfedfe2ec7 SHA-1: 82492db6317d79beb801505765f2cfb6305fc968 SHA-256: 1d5982a8940666c99a1685993a435d00c7a08466f0d6af72518e836131c1620e
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=b.+tech+ece+resume In PDF document text
    • http://files.ucporegon.org/uploads/1/3/0/7/130775565/2917163.pdfIn PDF document text
    • http://files.nativepflag.org/uploads/1/3/1/4/131483955/rusular-fufipa-relinoz-jikobuxapub.pdfIn PDF document text
    • http://files.renovatiowellness.com/uploads/1/3/1/4/131437655/940fbc51e956.pdfIn PDF document text
    • http://files.futurefoundationnigeria.org/uploads/1/3/1/4/131406592/jefox.pdfIn PDF document text
    • https://site-1042347.mozfiles.com/files/1042347/sixiliviti.pdfIn PDF document text
    • https://site-1038437.mozfiles.com/files/1038437/93576208241.pdfIn PDF document text
    • https://site-1039745.mozfiles.com/files/1039745/badivufapofotefofixinod.pdfIn PDF document text
    • https://site-1037268.mozfiles.com/files/1037268/mesefivola.pdfIn PDF document text
    • http://files.thatlawguykev.com/uploads/1/3/0/7/130776035/4606de21e20a9.pdfIn PDF document text
    • http://divimojaf.bridgendreflexology.com/uploads/1/3/1/4/131454526/jojadofusanek.pdfIn PDF document text
    • http://files.violaadvisory.com/uploads/1/3/1/6/131606211/xifoluf-xozurene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f4f44a-c0c8-4cb2-96b6-8ebefa81b8aa/gukaroselelubusetezejifej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23430390-5bc3-4890-a36c-bf24e1bbcedb/zotowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7166bdbb-e124-480b-bdc6-253ad8bcfd50/xebufekufetavute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e34f0c6-573d-4c5d-a0d8-8c504deb3465/79762958645.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_off00006930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6930 4880 bytes
SHA-256: c854fa6ef346497386cb69d4ce10c89111a0e32fcaf10d803f266e13f43d3511
font_01_sfnt_off000079a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A8 10628 bytes
SHA-256: cce4cc33a8dc13ce3752bb21cca48220d65698b507ef1d8f91914c5b3bfafaa3

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