Malicious PDF — malware analysis report

Static analysis result for SHA-256 3587dd92464b5ee3…

MALICIOUS

PDF

88.5 KB Created: 2021-09-09 16:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3a27f9b76b622f70e6e77483056b0246 SHA-1: f862e7544fdbef99123f294c262f99e1dac12d64 SHA-256: 3587dd92464b5ee3686d1b068fbc48e62e16a939fd0fe355364594fa3f039062
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file that contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://laughteronlineuniversity.com/images/upload/files/monixadubipirilogomap.pdf In PDF document text
    • http://mobydick-band.de/fckdata/file/23440711907.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/2983b80f20eb4d33630f7900dfca54ca/89940961963.pdfIn PDF document text
    • http://octapus.vn/images/uploads/files/43952571439.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/xemosem.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/68732843223.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/fawafowewegarojagav.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/temabalumosapezupokega.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/zuzawapixobofo.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/kajodewipifolatedolenelim.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16139ddd0c91b0---bezazuriwewebofarulu.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/zujosukeva.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/dapewegos.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/25819574514.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/zewukumosapaj.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c8764e597---lerirefejelunu.pdfIn PDF document text
    • http://thienthaopc.com/upload/FCK/file/91208123443.pdfIn PDF document text
    • http://ruiqingchem.com/upload/files/tevutinaxos.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/41890373107.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/50924743913.pdfIn PDF document text
    • https://sainaudit.mn/File/zezadoboxojabalobidab.pdfIn PDF document text
    • http://www.polni.si/Images/files/norudedabidomun.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/pulukojumizevafokivib.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/depisesamutu.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/40566831871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=game+cax+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_off0000f8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CA 10360 bytes
SHA-256: 61e4d82fcc8371ba5e47bba4c7f6f362f6c46047ab7fdc5207090027b500493f
font_02_sfnt_off00012824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12824 17096 bytes
SHA-256: c7037b5efb923ce8f8937065be2ed79e93a75ebdf2e03845025972d5ee20033f

Open this report in the interactive analyzer, or submit your own file for analysis.