Malicious PDF — malware analysis report

Static analysis result for SHA-256 32119ab37ba14763…

MALICIOUS

PDF

79.1 KB Created: 2021-05-02 03:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4603e4384b7353c0d59775622be77957 SHA-1: 52762dfef2a7cf5a05b14c7fa8db3e026ddfed8b SHA-256: 32119ab37ba1476394760aa3eb2adda35d687a8c8e340f9bb07bcc6dd1f3a0e5
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/strik?utm_term=what+is+a+land+grant+history PDF link annotation
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/2223269.pdfIn PDF document text
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/betivujelekip.pdfIn PDF document text
    • https://sixagezox.weebly.com/uploads/1/3/1/6/131606695/d0f5e9da6aeae.pdfIn PDF document text
    • https://mubelumovetofap.weebly.com/uploads/1/3/1/8/131856402/6da1f0c4f5bb3.pdfIn PDF document text
    • http://widarexidifazi.iblogger.org/fifasatisusidoset.pdfIn PDF document text
    • http://difanitukovu.mywebcommunity.org/learn_german_book_free.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/administrao_geral_tributria_angola.pdfIn PDF document text
    • https://ruwufinojib.weebly.com/uploads/1/3/4/6/134643146/kagijozipur.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/61425807717.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tapoloferazuziw.atwebpages.com/67060333931.pdfIn PDF document text
    • http://tatuzukokamowa.rf.gd/electrical_engineering_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/u2_achtung_baby_font.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/how_do_you_descale_my_keurig.pdfIn PDF document text
    • http://rilopuxam.rf.gd/93147246350.pdfIn PDF document text
    • http://katetagozu.epizy.com/laxex.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/48175380224.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/how_to_determine_if_a_hypothesis_is_one_tailed_or_two_tailed.pdfIn PDF document text
    • http://pupuwejerew.epizy.com/leloxupupemuvutimititu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 4872 bytes
SHA-256: c9c977ba662d86c604b31af4cb7d24c6c1082d9ae953b4c44f55011c8ec405b6
font_01_sfnt_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 11348 bytes
SHA-256: 868cd90d78b97e4a7fb2eaa770507fd706f80c5b48dd758ef9ed9d3629f06995
font_02_sfnt_off00011f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F35 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34