Malicious PDF — malware analysis report

Static analysis result for SHA-256 b017dd017f083859…

MALICIOUS

PDF

86.7 KB Created: 2021-09-17 15:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 79a6846f8a703f9df1d244e910e8a40b SHA-1: 9226f4744228bd59ad9f02ab8997ff495f3828ab SHA-256: b017dd017f0838595c36961f8cee0fa5ededd819a10af5f49d7ba0f024245248
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious or phishing sites, suggesting a lure to external content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the PDF is designed to redirect users to a variety of external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://itkaufmann.com/images/fckimages/file/9192756581.pdf In PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161330550c7012---11070132559.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/18110683404.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/75306480984.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/razilusolibugedifilovo.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/lijemofo.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/zikegimasubisozeb.pdfIn PDF document text
    • https://wasael.com/userfiles/file/makurivadasebi.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/wotigin.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/70385575622.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/tajepekonukoloruvonoda.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/6971019474.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/30661250058.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/zabigadafutetunumegipuge.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/safute.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/161441dfd4e39c---ginuxenu.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a17ef61d95---zakofaref.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/jajonaxokoja.pdfIn PDF document text
    • http://grupophi.es/uploads/files/2501109964.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/vumejigaz.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/xaxevijusomosevetata.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/zarojiwuvadiwudo.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/34252800738.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/68189765599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=aplikasi+edit+photo+di+iphonePDF 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_off0000ea0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001021e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021E 19816 bytes
SHA-256: f121c7393800ed52224927efe6e84867a1921b599b355dda7cccfa87568629fe
font_02_sfnt_off00013595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13595 10460 bytes
SHA-256: 5e26ef7d56184bf3f081b92eca3e70eaa2dda7ff7d69c1e5db7b9b2e9011d6c3