Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd30558de944d692…

MALICIOUS

PDF

84.6 KB Created: 2021-09-11 19:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 706017fe48fbcc98823a9969da6b0720 SHA-1: 8c9ea8167e871820a57ef1af428fd034b587aef0 SHA-256: fd30558de944d692d07806984f69b71fb8015dd0ff01c452f83dab4272b4e1ba
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 or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://sentezetutmerkezi.com/upload/ckfinder/files/bemavetorosamipew.pdf In PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/74410101341.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/b589c380c64ff01a2185e2fe9df1bec7/gajekofabewetopune.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/vojowovaxomijamubu.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/nitupevanekewoxomimanif.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/91274498594.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/jorijaxuxera.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/jivaza.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/xasuguved.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b695bad7bf---28176486557.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/74861907201.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccf93346e0---zakotanesiziwinufo.pdfIn PDF document text
    • http://rococosofa.com/files/files/6557710231.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/jet35qca6ip2g26bbhtadfnjta/lenuguxarafexomimagitinu.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/lareligazulosukakaraj.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613440d320905---rideduxurewinapiwo.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f9e9c6ab4477f551efef2ec2b2d38097/51009452149.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/lodubugivojo.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/nasabelof.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/19242042133.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/96772303590.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/09/08/62341685565.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/45262375429.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/89588338792.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/fijizujuvi.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350681c8f31---78994780221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+change+the+language+on+your+phone+keyboardPDF 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_off0000e396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 11056 bytes
SHA-256: 8c021e14589fb3adec8f5a49278ce6b50531fd0ddcc676934630f39a5bd77391
font_01_sfnt_off0000fce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 18332 bytes
SHA-256: 22da8bdb5b2ad9b8dbb37fbfd704120a8eccc6a91a34caec9fcf8d9828932b4e
font_02_sfnt_off00012bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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