Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5faa4277f835de…

MALICIOUS

PDF

72.8 KB Created: 2021-08-29 03:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 23ea3664b65538f7caef5f0767f34a3d SHA-1: a2c3ec2e300db0887fd6c03109e4f20740c787e4 SHA-256: 9b5faa4277f835de88e9646c2c47547c368d3ed3164fdae6f1a320ff823ae183
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://geraldinekilkelly.ie/mujozokusurafemojofa.pdf In PDF document text
    • http://gibisch.info/files/files/13659067435.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a9520fe65d05d9c718875fccddc7adde/38577492647.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a305eb3b89f---tiron.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/49260982466.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/96452442731.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16110aa0ae5db4---gexebumopus.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3ecf676b3e93edd12dc5aab96011b3ff/45562135823.pdfIn PDF document text
    • http://dakmet.pl/upload/rulamesurazatewu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d36bab19721---29988422599.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wogonisozovevibazo.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/lulitu.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcfd0cd0cd6---25744309545.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c358d193f8---83500245807.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/48597006440.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/n81j98f521qn8rgbeuekdr6fl2/dadipesukeganalagi.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/zibizowiduribipojolafis.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/33221802350.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/jf1u08ftu3l855gagvo2l83tve/gepulebuxokitomisipa.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ae7vno092h9pbip01vnglkfpi6/93252541488.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/7205087361.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/xoladorutojopijutu.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/kikesu.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/xolulenutorasatokojuk.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/nomutamironemap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=bible+message+in+tamil+pdfPDF 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_off0000badd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADD 10816 bytes
SHA-256: c50e5bd81ccc19c16c342661d7eac3b5daa4b33d99e46b20e2943ec3924c9947
font_01_sfnt_off0000d356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD356 15980 bytes
SHA-256: 61dead2e65d9337995281089fc235e6026e36d95b5c65d0b207db3cec2e7fa36
font_02_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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