Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd04223d710339d…

MALICIOUS

PDF

69.3 KB Created: 2021-10-04 02:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: db2511b75a28ce830da272ae86567073 SHA-1: ac52c4fc0f0309a040c9799e7a066f05fa91c338 SHA-256: 7dd04223d710339d160376e438a1e23e3690e04b9b7c2235fe8012b3fe5bed49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of external links and the overall detection profile strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://queure.ru/uplcv?utm_term=zoning+out+seizure PDF link annotation
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155923a13e20---jubexibijarotik.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/vatitijotubodonon.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/orobanejamiwikerok.pdfIn PDF document text
    • http://slotkuda.com/contents/files/zuxafomi.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/15655691044.pdfIn PDF document text
    • http://prmakeup.com/Image/files/pusotadinuz.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/14292597591.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/lusovexotaka.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/tewefudapekukefebigifotu.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/36176337818.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135865fe5a44---44946397096.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161484e8d69425---xolonepagezanizadojas.pdfIn PDF document text
    • http://goldmustang.com/files/files/tabeguxumet.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5479f3131bdd4310a5486c4cd6f54f4e/85576725430.pdfIn PDF document text
    • http://jcsh.bluezp.com/ckfinder/userfiles/files/79358899031.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/bebena.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/pusofarudo.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151eb544490f---wejegurugujakagosirepuz.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/kijuduvulitus.pdfIn PDF document text
    • http://djpress.pl/Image/files/61323586608.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/wonozotuzomuwe.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_off0000aebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBD 10196 bytes
SHA-256: fee0ee33711ec22548d62a8df6009963f5bafd4f309611978f79c5ba0c5ad441
font_01_sfnt_off0000c5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CC 16764 bytes
SHA-256: 1674fba0d98c8fb1dbe796b47282d384e6c0e4a7c55fc8836269304e8a6a2aff
font_02_sfnt_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1