Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b60e7fa40ddd913…

MALICIOUS

PDF

81.5 KB Created: 2021-09-04 14:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7a2e8fe40b6ced700da43703000caa4a SHA-1: e5177d560cc38f6eba1bd0167d9aa63090c3d395 SHA-256: 3b60e7fa40ddd913a55ab0605f3b874a96c4f42459b3d105b7d6c7c7e5518a7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to obscure the true destination. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan. The embedded links likely serve to redirect users to malicious sites for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/55980133893.pdf In PDF document text
    • http://www.dilipprabhavalkar.com/images/file/89666726816.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/zoxemur.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/sodagelaf.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/4ccd4da35d9403a1aa520b59ecedc6e0/gevoroxugo.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nstq6itg253dojptuc7jg9m26d/depuxifeninufimafafike.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/gixobufawe.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/2be8c95b3b24dc16e26cabd85cb62d1b/26775273874.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608d873b9b6ff---77662589206.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/72749028106.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/kijitejisikuduboke.pdfIn PDF document text
    • http://7linc.com/uploadfiles/fckeditor/20210828/file/16301502844869.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19381952378.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720c91b88ba---tebinutewozub.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/zajirufizujox.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/2181938525.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea7c534fc3---95618043307.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f9258877064635a26b19c9a12db04ca/pofojud.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/4ad7d82412a565cc78ba3563ad68ee41/dudeb.pdfIn PDF document text
    • https://peterdegendt.be/file/64496258921.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/61562170611.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/kccsg4gchj2v830udj1208d986/roleratijatibuwefop.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/posagorotivinuxatikusojos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=c%23+create+pdf+file+from+templatePDF 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_off0000e1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AB 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804
font_01_sfnt_off0000f47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8E 17396 bytes
SHA-256: a5306dec6ce78bf53237b28b5ccd5b1e6d92eadb6640b95d5d22e837f6e13395

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