Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0262a2feeda8b6…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 15:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 122c406e9f5b976924a91721394e51cc SHA-1: 82c5df804c1fe3e1f81974880b1fc32161a2ae68 SHA-256: 0d0262a2feeda8b653b4b91cd7b35d5897ba6c29733a16c996ab822b2b8a3d51
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837f550ee19---20858038381.pdf In PDF document text
    • http://sincaremedicaltour.com/js/upload/nelavijevikalivi.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610ee85890f25---wepip.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/93dfa462199d8178cf4870bfea97d872/55902213875.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/ab271d5a2822bc5df6c1a3a9b31501e8/44699690346.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/gaganepupibegiwuduxadotaz.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/dipudifulidutigajazumubi.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084939ca6dbe---budadasefifusogoj.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/2bffenoh2mipiofgb2f6htjm53/lojuko.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/15001658750.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c25234dfbdf---zekonuxo.pdfIn PDF document text
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/powasegu.pdfIn PDF document text
    • https://anup.bo/images/files/85020291770.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/pofovom.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/11730414387.pdfIn PDF document text
    • http://allasclub.com/campannas/file/63827633105.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/fibiboz.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/9734391429.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/remeguwem.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/padusorike.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/68347133581.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/valovede.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/rigep.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/59925406932.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f89aedc0fa9b213eed7b9adad0103418/2311312713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=assembler+system+programming+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_off0000d226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD226 11076 bytes
SHA-256: 54dbdece0c186fd010e1aadd027f2b1e82f36221b2a4206b229eda1e3e600154
font_01_sfnt_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 18112 bytes
SHA-256: ce856fa9297329892974cf31557d37d4a81fe6c0c76768c19450d6d23e479b22
font_02_sfnt_off00011afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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