Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf1dc7ab102a7c0…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 05:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 43526fd99c49be863b861b49aaee3d15 SHA-1: ae367cf32fa469695b2c86b1ae7c70b711f5255e SHA-256: 2cf1dc7ab102a7c048fc118678543f3a6dcc57e2e6d6be7f05f07ba89c586b6d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mintowncoffee.net/uploads/images/files/35218816668.pdf In PDF document text
    • http://vksraja.in/fckeditor/upload/file/bopufenefusesejil.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/66876635102.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/90022093651.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b33cca6d---sowamiwu.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/kudajadarow.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160769dc7195a8---detuwimadul.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a045e45ebef---91037863357.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/13705c14db2e5c64a380667f5c9b629b/pasolizesi.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/q9d1e3lsk3edd3egl6f4il2b5v/pamodufifotemutobax.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2d582ffdf---96485526838.pdfIn PDF document text
    • http://kccmaul.com/files/files/1843817727.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/jutinobevuginakanodala.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/womolatapag.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ec2ed0c20---vakodaku.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/4986e7fe59e9821c55b359a8ac154a20/golimimenagurugiwufagef.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/43371588870.pdfIn PDF document text
    • http://tfforming.ru/d/files/15212746880.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/8b8b1429c359d454d8fd7e8c6a46cb36/23213836817.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/255ac911c607ec6e30d06333cae1a808/48247395788.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=baptise+in+the+name+of+the+fatherPDF 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_off0000e647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE647 18004 bytes
SHA-256: 8f483948ac1a7b715203d44236829d266de3a65f05822b85d4776f0f8f077cfd
font_01_sfnt_off00011577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 10628 bytes
SHA-256: e8a92999eec141e7cc21529952e5a3a77ce65039de5f50b4fcfad70a4d7c7ef7
font_02_sfnt_off00012da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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