Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc047ee7a70005ca…

MALICIOUS

PDF

71.4 KB Created: 2021-09-16 08:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2b8e89e1f868316b481f3ec92488127f SHA-1: 00b6daf8f567f615489f213918db1d37dd79584e SHA-256: dc047ee7a70005caf182278ac7e7c3fb4e3a0eb5caf6dd6ce4239e1ddfe0b1aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are characteristic of malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://catamma.ru/uplcv?utm_term=go+to+my+phone%27s+home+screen PDF link annotation
    • http://nano-vip.com/ckfinder/userfiles/files/vokavivelaxu.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/fc513ae4b81d4c2a2354b065610c7888/65539847129.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161394cfcd4090---xogurepinakodawa.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/wezow.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/24489230794.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/jodelolukawavo.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f53df10b9e---10446867494.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/kogote.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd3bda8c6f---jetowepa.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409d87c8d20---xuxasudikudikafagokab.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/36938531083.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/dea0a5d22b9b6566d7d33d687b630d50/7122459024.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/46533033436.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/rurovavifagimixeredolusi.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b113f23301---demutozeketapogiwulojadig.pdfIn PDF document text
    • https://polytex.de/sites/default/files/42347406554.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/seweronulozeladejok.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/27688593811.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/56522023391.pdfIn PDF document text
    • https://linardi.ru/files/file/65061322296.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/85f29bb010b6d38875fd08cf41461c99/vovofepiloseguzemuleb.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/pebixadopepibaxepobe.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_off0000b842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD059 10524 bytes
SHA-256: a41037c32ec9810579e20c7c4dfa6f48f918e35768eb4b7d6e9dc95e99144f66
font_02_sfnt_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 15604 bytes
SHA-256: e20294aa89369f8838a71afb42594bef7a2dbe82fcc64a890bf6c0124502c9b3

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