Malicious PDF — malware analysis report

Static analysis result for SHA-256 0defd1fd4ed780bd…

MALICIOUS

PDF

132.7 KB Created: 2021-09-04 20:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 58b34cc6c964d6144884f38377fc4d95 SHA-1: a60b8ccce7e1ec19607aa63ec4b7a63487c3dc46 SHA-256: 0defd1fd4ed780bdfe7474c5c607cdea03e43fae6e559337396409b85237715d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/8db11f88dc7f8732c0d61f835741b847/39776911757.pdf In PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/cn5bct2fv3su2uj47m0ifac3u2/86496670034.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/0at4faf386m57hn9m1g0d6qc40/disewafiforaj.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/vapoxu.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad9c36036d---15800550939.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/008a626e1943860380b8760aa85d5475/juwoperefujarofemow.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/4e749a240d3cb023ab2d1316eedd308a/81626866797.pdfIn PDF document text
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/73405687615.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/73491941403.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b412d8b1c21---mexodoletumelifimopat.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8b4e2d12983c38844a1e643395b679d5/zafenirijomepa.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/durijafuja.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/b6b1769228c17b6c6e6241d4cb3055c3/tixoj.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/satomuvenenugoxobaraw.pdfIn PDF document text
    • http://ichieh.tw/uploads//files/202108110550253209.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a708ba6c100---zaximakumasonixarabilezo.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/vatujafiwud.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/barimifugifotikufidedev.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/jisale.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7eb115de6---87645576175.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/tezafegosawi.pdfIn PDF document text
    • http://medi-sen.com/files/files/buguwavusatisilapopodega.pdfIn PDF document text
    • http://dfanchem.com/upload/files/98652677772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=vegetative+propagation+methods+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_off0001a310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A310 10936 bytes
SHA-256: 6676c531606df32818ae1be27b7cb20caf21b3d0daff2f76b8fcbd2eb8697a3e
font_01_sfnt_off0001bc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC06 18604 bytes
SHA-256: 7b34804cbd8c43d1daaec8d5ba5a893d9896b61fdb426006323482520c376a21
font_02_sfnt_off0001ec9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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