Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c65ecbfcaded76…

MALICIOUS

PDF

83.4 KB Created: 2021-09-04 13:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5163878dd532183fe03cef717b6239cd SHA-1: ba8207ef9d6c02716499bf65d09b24215d5def24 SHA-256: 69c65ecbfcaded764bc6c7285c2fe72929239cf1315a675194f43d9e9e4c2246
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories and other potentially untrusted domains, indicating it functions as a link farm. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/dq6el9isn2o74rqsnhdmro9s85/59344808501.pdf In PDF document text
    • http://mikailang.net/userfiles/file/20210515113344_1606836875.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/morik.pdfIn PDF document text
    • https://edebmachine.com/images/media/files/bobuxinutotikumasiz.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/jopefavekijiv.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/zuvovigijowowesedop.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f9d1937b---retotagujedexipafipeb.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/31839603216.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/zuvasubefele.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/c640de37e321d47788b26993eafded89/kafifepa.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/jozomufunu.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160842773aaad5---53481092735.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/51924364799.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/7872d91345e2a917d3d9eeadf9d5aa99/defosu.pdfIn PDF document text
    • https://babamore.com/upload/ckfinder_temp/files/20210603012152.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/30202262086.pdfIn PDF document text
    • https://digiconelectronics.com/media/287195460.pdfIn PDF document text
    • https://aokman-drive.com/d/files/79804012849.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/c3a2e86563ccf7baa33effbde3ed62a5/xemari.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/xudodovenoge.pdfIn PDF document text
    • https://12shio2.com/contents//files/xulur.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/mikijuleg.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/9b22d3f5305a68d63f75b3d349517f9d/89720433647.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612b300ae122e---77655498083.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c6e3a15c5---66838621526.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/eco0iqe620c125648lj6b0vk69/4193779230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=shree+lakshmi+stotram+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_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 17144 bytes
SHA-256: 9d1b9606f09f384ecdfa8396da7a420abf283693a0e81cc43dd17548e1f17dd4
font_01_sfnt_off00010ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF2 10824 bytes
SHA-256: f3f8c26f07b04f8c051553f083dc4c19f186300f52842752b071624a2b2ca3d1
font_02_sfnt_off000127e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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