Malicious PDF — malware analysis report

Static analysis result for SHA-256 033a3af862e1d8ec…

MALICIOUS

PDF

81.0 KB Created: 2021-09-07 18:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: da5736e625dae6f2678f92cee1e8c9d5 SHA-1: e077ff7a81e84e6b9dd4c3906e6e8848d55a24ad SHA-256: 033a3af862e1d8ecb037ed34950c646b3088478e2173a70de8dec549d093e593
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of a raw IP address in one of the URIs further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160724034c02c4---4811491099.pdf In PDF document text
    • http://tamphuhiep.com/Images_upload/files/69319304511.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3fbf123dc---44665988315.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608778e48f7e9---38051894529.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/tetevasuliwodikejal.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871ee4028f3---dejasoziloge.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b438b10a6fc---gozozidusibumojuzaj.pdfIn PDF document text
    • https://virker-ikke.dk/files/70009091567.pdfIn PDF document text
    • http://tion.hu/upload/file/lereborinifewolep.pdfIn PDF document text
    • http://ubest.ru/images/file/nininebaxatomaw.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c548a8065---90078260122.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cee987affd---99388740689.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/mezerakufuw.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/64029035034.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607076dbcda10---66958535946.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/33257449368.pdfPDF link annotation
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c372f32aade---49860243895.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/pg7fl6kl808i9ucrs4833k5q14/butomajovazafef.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc1acba727---ropedi.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b649cb6bb9d---87340025394.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/tomibifafit.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/27139890248.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/48643534828.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/51dffac2f7c93b7e2fecea3399aa0eda/turifulowidakedesig.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202108290429107487.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/runaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=peritonitis+perforasi+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_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF143 10448 bytes
SHA-256: 97c482ae795c59e8b0e453a9bce0dde382defb70118b994515b2f7add4362ece
font_02_sfnt_off00010916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 17440 bytes
SHA-256: 94121d6f66014c4f42f9059dc041a21c834bb8d2ba9542eb44e4c67df087deeb

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