Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e05035d122d4fb…

MALICIOUS

PDF

42.6 KB Created: 2020-10-05 13:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 753c001db53816af98769b1b42869b36 SHA-1: dc4dfc72d1882bba29990441e0cf7e1b9e5c1d4e SHA-256: a9e05035d122d4fbcc9a65c7637191f9b97b4c10c4a6b883e4b6d3d3ff159b67
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=terraria+calamity+classes In PDF document text
    • https://site-1039140.mozfiles.com/files/1039140/xeler.pdfIn PDF document text
    • https://site-1039203.mozfiles.com/files/1039203/83875617322.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/71519827180.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/vuladatulukodug.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/60492081991.pdfIn PDF document text
    • http://naleta.tphlink.com/uploads/1/3/0/7/130776445/noxejar.pdfIn PDF document text
    • http://fatako.anyakunze.com/uploads/1/3/1/4/131438873/voxuviwipivimux_tolugejulebeso.pdfIn PDF document text
    • http://files.2ndchancehypnotherapy.com/uploads/1/3/2/6/132696214/655720.pdfIn PDF document text
    • http://files.sweetbasilhurst.com/uploads/1/3/1/6/131637603/paxivuvoduni.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/1/0479/4685/8652/files/a_thousand_pieces_of_you.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/dow_corning_795_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7094/6456/files/kamenstein_digital_scale_manual.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_off00006c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C37 4996 bytes
SHA-256: 72b135d9461da5dcca6932025149a6b464baf706b000e2237c64d9bbc80d6f55
font_01_sfnt_off00007d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1F 9516 bytes
SHA-256: af4dc94833683515103a5decdf26d6435a5aa5afab717df8a9e17c11ffa6face