Malicious PDF — malware analysis report

Static analysis result for SHA-256 88473ef96d5a3009…

MALICIOUS

PDF

80.2 KB Created: 2021-09-09 11:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fe65a95e23345f9c61c512ca3d79d4ce SHA-1: ea790afbed438cdd5394d5230219ce0bc87e7e67 SHA-256: 88473ef96d5a3009260b3261412b4744e4d6525e715f9bd12c20b23309b54827
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also features a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of embedded JavaScript indicates potential for further malicious actions, such as exploiting vulnerabilities or downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=regolare+colori+schermo+android PDF link annotation
    • http://studioturina.com/userfiles/files/wajapolutaxelexovoz.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/gevazatuletoketav.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/sepiwes.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/26161028493.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/zutujumesitaxox.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/kojobu.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/29139389684.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/nunofilulesinajes.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/liwepivamigaz.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a05e9f28c---14704540538.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/56347820675.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/lokaf.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/97704097252.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/bupodulijelov.pdfIn PDF document text
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/37300999127.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/wilogojowetadonanajagi.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/34161873723.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/lakize.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613642e7c5627---73672630656.pdfIn PDF document text
    • https://codefon.hu/js/ckfinder/userfiles/files/vojafisokinidudig.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/bubodu.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/1i7pmps3ufcp6orgo1gnikf5u3/79792601043.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/83376226641.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/37633182389.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/74607875998.pdfIn PDF document text
    • 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_off0000d559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD559 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 10764 bytes
SHA-256: 884800b7c8c2b360bc9eaf50b19fb7b117bce4318d8bfca93bf5b68241ff3966
font_02_sfnt_off000105bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BC 17348 bytes
SHA-256: a60a1fdb956aabdccb2119d9629c00a196e3831260b79e2bfb590ebc5953e87e

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