Malicious PDF — malware analysis report

Static analysis result for SHA-256 5206ee702597dd5e…

MALICIOUS

PDF

75.0 KB Created: 2021-09-20 11:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1924d0c478e39c647150f83816936e72 SHA-1: 590cac0c4768bf73f483859a4b05bfe2eb97cb94 SHA-256: 5206ee702597dd5e65698c3c3ffd1265051532599350443bec1859d3b3325f36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to various domains, some of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of a 'utm_term' parameter in one of the URLs, specifically 'minecraft+0.14+1+free+download+apk', indicates a lure to download potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://fotofolliasanlazzaro.it/userfiles/files/majemukovuwofelijujesiman.pdf In PDF document text
    • http://jun-travel.com/userfiles/file/9567961263.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/gepewujibafedesoguzizawib.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/56902577265.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/31408746030.pdfIn PDF document text
    • http://gdgom.com/upload/file/210917170524790707wc4nvo1icgnm.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109100121225141.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/29645738254.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/95657324792.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/63770357705.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/24600114891.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/51662655463.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/47172472101.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/18606921904.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161476bbaf1308---26426080413.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/86057030197.pdfIn PDF document text
    • https://telenovella-bg.com/files/78089889439.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138df378c493---narijufomemixuxu.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/39353434576.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/kiderixuj.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613343c842873---21843776521.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/2dg2ogn7jv5mujf55j55mct11c/gelumafojagagamitu.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/93796845615.pdfIn PDF document text
    • https://wasael.com/userfiles/file/91577755900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=minecraft+0.14+1+free+download+apkPDF 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_off0000c05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD876 10932 bytes
SHA-256: 24ab2d1e3f30c454db73709f32278a16a8bfaa80221efb4a88b31e1b8ca21121
font_02_sfnt_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 17268 bytes
SHA-256: d38c4eba1ea9de4e44a39e02a378edc17ff07c72b4d65b11509879f206dabbbf