Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e5a33b36e5e3bf…

MALICIOUS

PDF

39.5 KB Created: 2020-10-08 22:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1d58689dca6d3312d3db0bc158e3dfcb SHA-1: ed8d4e44cd9ae542e18311499d8982cad718f316 SHA-256: a6e5a33b36e5e3bfa667798e31bcff142506de72e85b2ab86b785b9847a7e823
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://gettraff.ru/pify?keyword=maintenance+request+form+pdf In PDF document text
    • http://files.evelyngamacounseling.com/uploads/1/3/0/9/130969938/vuxuva-fatuxufexo.pdfIn PDF document text
    • http://bavopu.alchemyls.com/uploads/1/3/0/7/130775219/3f24fd7951ba5.pdfIn PDF document text
    • http://files.palmerstexas.com/uploads/1/3/0/7/130738548/majikavaxu_xanadigij_gosejum_xabifuv.pdfIn PDF document text
    • https://site-1038365.mozfiles.com/files/1038365/dodanodunajavelufuwa.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/famozanovuno.pdfIn PDF document text
    • https://site-1039549.mozfiles.com/files/1039549/fuxujebafisularipa.pdfIn PDF document text
    • https://site-1042620.mozfiles.com/files/1042620/86521007072.pdfIn PDF document text
    • https://site-1040665.mozfiles.com/files/1040665/paditaf.pdfIn PDF document text
    • https://site-1042346.mozfiles.com/files/1042346/dikezezazedewebowofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7234/7048/files/wayne_dalton_quantum_model_3213_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4493/8143/files/tijenut.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_off00005cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFB 5400 bytes
SHA-256: 1fac9bf77f43e5422cef11c09c4a9e10a36ff6e6055cf403409a40b473b5d2c1
font_01_sfnt_off00006f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4A 10180 bytes
SHA-256: ea5ef80b8aec65a8c812d3da2f4efa3518d0d098e50a7e6706eeeced2c261193