Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bae562aa2cc8b3e…

MALICIOUS

PDF

71.0 KB Created: 2021-09-28 09:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cba39528c803141a300107f0ab16b69f SHA-1: 5903e95cdc2c4631e5469be2554b6b3390e535f8 SHA-256: 9bae562aa2cc8b3efba8961ba7aa4243703e327f6e38c8338e31f603b2d0c430
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to disposable hosting, and one identified as a link farm. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to potentially harmful external websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://euronuts2009.ge/files/files/2514477623.pdf In PDF document text
    • http://dar-tom.pl/userfiles/file/xubavimoguwewuzixurideto.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ac4c05c84---mojuvufinajasol.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/2964383706.pdfIn PDF document text
    • https://camphacement.vn/upload/files/wogopabakazatin.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/pexijefukekinabiniwebat.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/varavikadifepiraxefo.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/93365370398.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/neridiv.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/xijudigelumul.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/69397369271.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/30316278129.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/24696879438.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/nusizukup.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/womawexofafibemile.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/dovakozapujugesedujid.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/kofiweped.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/56646462662.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/35460031608.pdfIn PDF document text
    • http://ijiantu.com/filespath/files/20210922170513.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f98a26f459---valemekagofurowekas.pdfIn PDF document text
    • https://coluer.ir/documents/file/93978862354.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/12740849524.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/35930568520.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/koxov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=shakti+serial+season+1+episode+1PDF 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_off0000b0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A0 17248 bytes
SHA-256: a5c64095c0c48f9050f1d1484928bd6974e5c94bbf091d5f846267f1e57c6944
font_01_sfnt_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 10708 bytes
SHA-256: d182a6577018270adc7a691078984a2e24c0a21d725123319e9f851194880bcc