Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fd7904ea55b07b…

MALICIOUS

PDF

77.5 KB Created: 2021-09-09 13:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d04d230cb7e0d5b9b05deedba7f69461 SHA-1: 8b26beb0275ebe8a7880dd0456750cdd0d687a14 SHA-256: 08fd7904ea55b07b93b3ff083fa128770c1cbcc65e70cca8de975e05aef6fd04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://planao.com/ckfinder/userfiles/files/66743686025.pdf In PDF document text
    • http://maschimaurizio.it/userfiles/files/mojetiduleje.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372cb0c9d6f---nexafejunofubajewobotaw.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/pafarevudafimawosok.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/bagadi.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/26327465761.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/77612022494.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/zuralojoke.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/lewerovefoxanelubo.pdfIn PDF document text
    • https://venus-forever.com/image/files/saguwedilojogetiri.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/96417315645.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/rirafupowokimar.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/rolalimerulizupi.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/931f9e64138671c6fea84a9815f6f95c/19985999847.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4821390588.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/fafoxikuve.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/7af78b92de9f927ff52b5d58831b999c/levigex.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210901_195151.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/legulupefufiriruz.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/59df6585ac2333b22eae856370200f7b/lafededosi.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/pejomujaroxaleravow.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/5634883578.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/29368209034.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161315667ea7d2---61852960667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ufc+undisputed+2010+ppssppPDF 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_off0000cacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E4 10588 bytes
SHA-256: 9f45f2641111cc1908eea4562e7a377aaf6f2e2dad176069abbfc3ce22e83ad7
font_02_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 17612 bytes
SHA-256: ff1ef60ca72122d4d73a439949b2cbcd1a44c29ada29f7b8546fd4da98367d7a

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