Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b9e7c472fe1049…

MALICIOUS

PDF

70.7 KB Created: 2021-09-25 13:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 11f068a1972afb975869ec88f718ae95 SHA-1: 832a1e06a70775fda6165446640124e8f6f4e49b SHA-256: f8b9e7c472fe1049db278b3030962630bb34349d7d028fa850642bcce9f2d738
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://idosekotthonaveresegyhaz.hu/files/files/87177916737.pdf In PDF document text
    • https://kudusde.org/resimler/files/lifarekofoxovamikefusasex.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/79145418780.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/3542101662.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/rurakunob.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/sasezuzebiridozumolaxaz.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/29863374251.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7e21c4301---gutafajiwumebidog.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/87445143295.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/kejew.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/58541718537.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/jaxivazizedolozaxevun.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-20/20210920010705629252.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/67719185333.pdfIn PDF document text
    • http://psychologadamczak.pl/userfiles/file/rewunilexusasiz.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210911205121.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/57088613282.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/xapibukaginegixana.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/mumexinidazujatavoxogel.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/bapimilefitodiralu.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/luwejujogameguzazalebun.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/e25a43cb06410a5f84a7c42503376dd3/suxamonuvineno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=funtouch+os+10+reviewPDF 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_off0000af49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF49 10520 bytes
SHA-256: bd4d0711ce1a9268157e952146c2026d4a7a26f98d7e774265f767f158483aa0
font_01_sfnt_off0000c74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74B 17860 bytes
SHA-256: 1b29f222988978d43973ece526ccad4e51cf3cf3dfaa40c533b9a37d8ecabf04
font_02_sfnt_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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