Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de046cf74589dbf…

MALICIOUS

PDF

76.6 KB Created: 2021-09-16 15:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d8908a13f1105c4834c097ce9da36203 SHA-1: 3205aee58ddd11d27ab5c4e3c8599edc985edf73 SHA-256: 6de046cf74589dbf2547b7f9aebaa0dd4e436f40f20439c8afcd7e4798d3696e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=hill+climb+racing+1+hack+download+ios PDF link annotation
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161377d9485c4f---wurazibujexabibot.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/1582976519.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/70337982073.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/73935924112.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/6640058734.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/13928141559.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210906000721.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/fajixam.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/xabujofusetilinubupegofim.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/50647127368.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/87310231209.pdfIn PDF document text
    • http://sro52.ru/uploads/files/1360529579.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/11906050516.pdfIn PDF document text
    • http://tion.hu/upload/file/xejidazajevipogubifobezid.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/jawuvesoxijifugulezizi.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/97514776827.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/rosofewimubetopumuz.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/19282295483.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/fazafuvogebim.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/guguvofikudore.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/6925066969.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/25834875957.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC730 10948 bytes
SHA-256: 782eafb032f03c5ce802d6b565419bacbd4f8171a02f04e567932b0466a4fb65
font_01_sfnt_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 17432 bytes
SHA-256: 583f2fc9c57d5a5a15db0814b5607b185d7cbc3b26221eedaab4c5d8e016d607
font_02_sfnt_off00010cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1