Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca625112fdde1a3…

MALICIOUS

PDF

80.5 KB Created: 2021-04-04 15:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6ab8e046394fc2ce72e991922a6fae65 SHA-1: e59634a28566c0433a6210d12d51e62bc03cc0af SHA-256: 0ca625112fdde1a3e6af88214e5d5b1a8817af402107d12a549a4482684fc2ce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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/award?keyword=pengertian+blanching+pdf PDF link annotation
    • http://artdebug.site/fixanexepifikiwobcfcp.pdfIn PDF document text
    • http://circulyarkadigital.xyz/gudulanawomevidawawupesainuv2.pdfIn PDF document text
    • http://zoo-taxi.site/ct_resale_certificate1d0qq.pdfIn PDF document text
    • http://mon-cmbretagne.com/macrame_tree_of_life_tutorialx9gso.pdfIn PDF document text
    • http://it50disconto.pro/their_eyes_were_watching_god_movie_synopsisg04f7.pdfIn PDF document text
    • http://relax35.ru/how_to_install_codechickenlib2106o.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/broiler_chicken_house_design.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/nuferibawo.pdfIn PDF document text
    • http://bitjoms.xyz/awkward_season_1_episode_19gbqt.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/pioneer_deh-p8400bh_set_clock.pdfIn PDF document text
    • http://chatik85939775.fun/21159919458yffq3.pdfIn PDF document text
    • https://lidoxuma.weebly.com/uploads/1/3/4/5/134584164/gufolemazofux.pdfIn PDF document text
    • http://ilmahli.com/menu_pal_pal_yaad_teri_tadpave_se_tera_roop_jigar_mp3_song_downloadbwri7.pdfIn PDF document text
    • https://tijaworiluwulu.weebly.com/uploads/1/3/4/3/134363233/2223268.pdfIn PDF document text
    • http://migriruy.ru/historia_derechos_humanos5hous.pdfIn PDF document text
    • https://vusutiti.weebly.com/uploads/1/3/4/7/134762674/8427273.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/wivajerenoba.pdfIn PDF document text
    • https://fedebeforejasu.weebly.com/uploads/1/3/4/4/134498020/452b845175433.pdfIn PDF document text
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/tosadotut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vivetusukuv.onlinewebshop.net/corporation_law_bar_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7885e0f7-ee88-42f9-9a15-3c94cf1cc32c/ejercicios_de_trigonometra_tringulos_rectngulos.pdfIn PDF document text
    • http://kerexiref.onlinewebshop.net/mejutujutovawiwezixovan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0fd838-4b67-48b6-80fb-7a37ac986315/4941395446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a145edc0-043f-427a-b0f6-f0ee5d0c90bd/44783356015.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/rolubosowubetagusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b816b261-2576-448c-b5dd-0e69f61b01ae/mugevemuduvefuxiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ace964d-ba67-4524-b310-1ea960cde943/rugoxeru.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_off0000fd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1F 5380 bytes
SHA-256: f2add808b6f3e35f9328da954159abdfd61ac8408f77d3bbc8eb5d19c4726865
font_01_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 11008 bytes
SHA-256: 7523b6fc6437ff1490f432802ee035266e6479199cb77f09ea15b14e9d1992f2