Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4068bfdde448969…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 09:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 93fa304fcbf2996849181c2d688025aa SHA-1: dc6a447306ec08b897529a02c24256d14aa32cf3 SHA-256: e4068bfdde4489697597cc1c05c81c5730de95724501830db1408e436c5544b6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded links, many pointing to unknown domains, suggests a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://anadolumatbaa42.com/genelresimler/file/lokasopuxekuwaseg.pdf In PDF document text
    • http://childprotectionindia.com/lexcyberia/userfiles/files/kubedavojali.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/24414579015.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/13552778444.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-11/20210911225314352819.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/latemorajibedovepav.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/8452248912.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/71871678751.pdfIn PDF document text
    • http://prota.ru/upload/files/71593923128.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/gejuzuxowolabaxikekubub.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/kesawutonuzozuzezixira.pdfIn PDF document text
    • http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/42474968149.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/27835321245.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/dubuzororo.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/bebilabeza.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/lewijikimesok.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/wixanux.pdfIn PDF document text
    • https://nissanzorba.ro/ckeditor/ckfinder/userfiles/files/92443614310.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/93854862945.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/34854670133.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/e6e9640319ded891dbe75fb786d09fef/povatu.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/kamomaxaguludeneworejov.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/kekidekaxorasapipufuture.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/bogajuduvaninud.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/xapanusudowejisef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=geometry+dash+1.4+apkPDF link annotation
    • 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_off0000d8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D2 10856 bytes
SHA-256: 8eb4c19a5aeb624d573fb8ba0c657dfc32cc85123a2885f1467537735d2f57c1
font_01_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A29 17780 bytes
SHA-256: 1ad05d5dfb1d545b042fb74c621b549483d86c63a6272ffb55173d67e7901030