Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc70809f877d95e4…

MALICIOUS

PDF

74.6 KB Created: 2021-09-18 14:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4a5ef42517d101006077d056e76edceb SHA-1: 602fe825e434acd15506467b557084ef792e2c8b SHA-256: cc70809f877d95e4e19e2d217f1cb5b462a2a3a5216b62318aa069bd680a8204
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable domains, suggesting a tactic to obscure malicious destinations. While no scripts were directly extracted, the nature of the PDF and its embedded links strongly suggests it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://aotwresort.org/ckfinder/userfiles/files/21301717301.pdf In PDF document text
    • https://ctners.com/ckfinder/userfiles/files/14056495751.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/xalikede.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/netufodewemolubipusu.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/kitaxaduzutifa.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/resazadiwe.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/10859279916.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/28377859644.pdfIn PDF document text
    • http://gardatrans.com/content/Files/11559885395.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/16415694123.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/fimumor.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/83477340116.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e46a28f89---sibal.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/jowewonetosipirajevil.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/rudurupasip.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/vafavisolexetulorixib.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/taxeb.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/99725889937.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/salewasudiligab.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/25938901528.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/47096213026.pdfIn PDF document text
    • http://www.edgartownschool.net/uploads/files/6905290047.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/binujubafevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cheat+game+my+cafe+androidPDF 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_off0000be62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE62 17748 bytes
SHA-256: e7a7f1239c01e2d40ebb42e1b3a32c2dcf2421f28b540efc252a05d446223ae4
font_01_sfnt_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10468 10852 bytes
SHA-256: dbaa491c361eb535c9f50a6b394d7da703cb5bc1f6ed21625524a01a89308556

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