Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32d14d00a52ccbc…

MALICIOUS

PDF

84.2 KB Created: 2021-09-15 21:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3e67f8f16713cd18a510a0744fcbaddf SHA-1: c3ec867fff73d4d2f57cafeee41a0529b5fa625b SHA-256: e32d14d00a52ccbc8f68269f56feb207b9b8918b5c65a82442d6c7840800cca1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further support the malicious nature of the file, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://classicalgardenstatues.com/uplds/file/49558075794.pdf In PDF document text
    • http://skolky.info/foto/images/file/geredovuvav.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a5cb786ac---6991587964.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/fetufapugoxedew.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/68883027903.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/bofisu.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/70462671368.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1997397f5---jivupobodigemugusipiw.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/fowizabiz.pdfIn PDF document text
    • https://kirbas.com/img/uploaded/file/zupalevogebululiba.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44244306915.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/zojefewovebibiz.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/7c46c43ecf6bdd299b5664f51ea20514/98872401199.pdfIn PDF document text
    • http://rassadaspb.com/new/files/file/67057972201.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/sebegumogulin.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/gajobizekemupulipuru.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/kezumuz.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/31086791502.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/60097078766.pdfIn PDF document text
    • https://micsys.in/userfiles/file/zigukolojigokunaberemola.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/narenenejomep.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/98fbf1220dc413eab4be084800dd03ec/24897406481.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/9910356566.pdfIn PDF document text
    • https://zemtechnika.lt/public/site/0files/7455794367.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/bibebizavo.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/wurogonawijibunajekuzuper.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=malen+mit+freunden+androidPDF 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_off0000daf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 21272 bytes
SHA-256: 7c14ddce657a89a3f475682271abe5b2cc0e4ab0a0f3097e0e45668e8d833e6b
font_02_sfnt_off00012a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A25 10440 bytes
SHA-256: a04b968ea5504f5eed73bfcfec933f48c8e45a002f29d312d715c33a4ee6c4fa