Malicious PDF — malware analysis report

Static analysis result for SHA-256 46375759413a727a…

MALICIOUS

PDF

81.1 KB Created: 2021-10-10 03:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 95b7e4da6bdec089a0a4c844baf54459 SHA-1: b4f92ef228416715ac86636603f9b6b64db66a7f SHA-256: 46375759413a727a7b95fdcced955aaf77d86ae3a9e52a0831a2b02f86d89185
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates an attempt to lead the user away from the document to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://garglob.ru/uplcv?utm_term=l+put+a+spell+on+you+creedence+clearwater+revival PDF link annotation
    • https://thanuyentea.com/ckfinder/userfiles/files/80805766023.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/bapole.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///36772335254.pdfIn PDF document text
    • http://bresky.cz/res/file/62068990884.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161556aa2ceea2---29268070599.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/nazigefajulisimor.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/sodemitelokeranaruruvifo.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/28650727142.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/goleta.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/riketuzutez.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/30663274181.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/dupidarajexis.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/nukeven.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/j9bf4k64vd4ir3cu7a5f5n2pod/goluken.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/jiwozebu.pdfIn PDF document text
    • https://shibbirs.com/media/files/punit.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109082132125751.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/1a0e80050e8ed692e9d1fcf7ed754ea1/wigofulodip.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210901212609.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f075bb6a97---18778916333.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/neleturebafawaxodilobak.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/40690528844.pdfIn PDF document text
    • http://tongdingjixie.com/d/files/kolezurojul.pdfIn PDF document text
    • 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_off0000d201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 19716 bytes
SHA-256: 5ad83123c01e427d6371328c5e27c7221a4bc85a2495313b5513a2ea03dd4aac
font_01_sfnt_off00010555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10555 10828 bytes
SHA-256: 22648a12d167955aedd78f473817390543c0ff87e14287652097c3463f317c3d
font_02_sfnt_off00011e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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