Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeecc8a0a164d494…

MALICIOUS

PDF

45.9 KB Created: 2020-10-02 04:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 40552e35ee9cee36ec6ccc5ef6443575 SHA-1: ef99eb8de8b5b463d958efc6f277e58bd7402b7b SHA-256: eeecc8a0a164d494734a8cc9c70d57de9d4b8b9ab75f3e35db5526d226f97eac
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=hey+there+delilah+lyrics+pdf In PDF document text
    • https://site-1038700.mozfiles.com/files/1038700/78092205527.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/ferunibuxujonutap.pdfIn PDF document text
    • https://site-1040034.mozfiles.com/files/1040034/sizokorobetixoxerevev.pdfIn PDF document text
    • http://files.woodlandpeaks.org/uploads/1/3/1/4/131453247/cb12869e077bb8c.pdfIn PDF document text
    • http://files.lilgothlivepicture.com/uploads/1/3/1/3/131380177/9574131.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/21458380817.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/livuvovu.pdfIn PDF document text
    • https://site-1038884.mozfiles.com/files/1038884/dubuvon.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/72838556892.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/manabemanidipirivi.pdfIn PDF document text
    • http://files.familytreesbirthprograms.com/uploads/1/3/1/4/131407111/lopozupe_xuwifuzofazi.pdfIn PDF document text
    • http://bufotem.shopatlantaskinspot.com/uploads/1/3/0/7/130775612/jinizuwejereban-zepakerev.pdfIn PDF document text
    • http://gipagal.lethbridgeelectrical.com/uploads/1/3/0/7/130776783/079b902.pdfIn PDF document text
    • http://files.seedlingsystems.co/uploads/1/3/1/6/131606397/6485245.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_off0000727f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727F 5308 bytes
SHA-256: 5db0acc56a9f391f8ba16044ca0958e389d3e037c65fd9286db487d1fa883755
font_01_sfnt_off0000848d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848D 11128 bytes
SHA-256: 31140b7191f3d0ec49265cbe1df7cc7c323e04f741dc9f45157ae26b2a2a485f