Malicious PDF — malware analysis report

Static analysis result for SHA-256 f431f5170fa4ba50…

MALICIOUS

PDF

79.0 KB Created: 2021-03-09 17:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d1a3192c318e86e537506f234e01f226 SHA-1: 225acf93e8740fd8f5f7a0b97c35592629a96051 SHA-256: f431f5170fa4ba50c6ae56eebd3ea3168112d76ae32caaf2e8ea7b7f85014c42
126 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded links, many pointing to disposable domains, which are characteristic of phishing or link-farming operations. The presence of external URIs and a link farm heuristic suggests the primary goal is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=us+history+questions+trivia PDF link annotation
    • http://goloszauniver.fun/zovizut61zv.pdfIn PDF document text
    • http://edevletorg.com/belefqg8no.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/jisapebotewegise.pdfIn PDF document text
    • http://lg-copyright.com/bojeran1w9.pdfIn PDF document text
    • http://counterman.ru/le_management_des_risques_de_l_entreprise7dzt2.pdfIn PDF document text
    • http://dresdenpharma.ru/16071383225pggii.pdfIn PDF document text
    • http://xopivodez.22web.org/fosonitibafiwone.pdfIn PDF document text
    • http://arthromedshop.xyz/how_much_do_criminal_defense_lawyers_make_in_new_yorkd9l40.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/panasonic_kx-tga939t_headset.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/jhGighf/furious_road_movie_2018_cast.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/schwinn_recumbent_bike_270_reviews.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/mezogagipubejutezojo.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/nel_tornado_coil_for_garrett_ace_250_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/heQhfhj/80316033672.pdfIn PDF document text
    • http://byseles.xyz/convert_into_html_using_pythonu1q2e.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/lobufebo.pdfIn PDF document text
    • http://tebivumiwutuf.iblogger.org/what_personality_type_is_a_mediator.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://zerowegujij.onlinewebshop.net/used_john_deere_214_for_sale_-_craigslist.pdfIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/tesidavezafivokofowitafa.pdfIn PDF document text
    • http://riberudedanute.epizy.com/vekinikov.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_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 4904 bytes
SHA-256: 25bbffb71a1915590d5db48225ccdae4633cad57b039510b9b57b84c943a2a3f
font_01_sfnt_off0000fbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 10832 bytes
SHA-256: 42827807911cd211d4d78405575d4c685c9a380a5cd0d5e7409f931eab4a016b
font_02_sfnt_off000120a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.