Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e32b737f9a8f33…

MALICIOUS

PDF

83.5 KB Created: 2021-07-03 00:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7dac24f0d0bf8dbdf1e02884c4873ffb SHA-1: 53ee52e9594f7922671d0807935e7ba21c0a0e59 SHA-256: c3e32b737f9a8f33023d0ee3a5c03cd053fb350d9ff0ac21460450b20b9691d1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing attacks. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6e2743e3a14fc4cd4bbb57020d3a7164/tutamiwazusoxuluj.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92065a641---gowow.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/84222851847.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c531605594c---14768126104.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c3bdee50---35279474118.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/55150dd5eaa1d4c9829d6ee73c1f750f/70645093852.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/13794986295.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210605035800.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160940669a0f3c---43792680387.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fa032ea90---69052704759.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/gifavelilesafepidoj.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/detexigudojuluxobusola.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6e8de3d61---40436047051.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b436059ab---wakujapasusiwolanig.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3b7d6b802---dugideginetinivukovugor.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/nejujowogazuwiwami.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa71c321b30---66203477253.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/rulawomenukosufonusux.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c1ce2ab7a---85188374129.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41dffbe24d---musigoditibunekabalokase.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/96d82266b4a803cd94079edaed61f408/savaperewelimuwezu.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/gavokojirapani.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094280d13330---xukoba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+oxford+handbook+of+national+security+intelligence+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_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 11408 bytes
SHA-256: 4138ad0f416f802f561513fb257bb483294bbeed7a8280b612105104579eb9b2
font_01_sfnt_off0000fc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 16844 bytes
SHA-256: 1ec08bea01650f5e0962255ce0c873bf789ba00f553df7627906948766ccce1c
font_02_sfnt_off00012823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12823 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1