Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6364e5046277ca…

MALICIOUS

PDF

71.1 KB Created: 2021-09-15 21:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 03b695a7780dd7f01882c1dc5e4d329b SHA-1: 578950de8f6c9f8c26081671127573ce0dc5f629 SHA-256: 2e6364e5046277ca79ecf025fdb8a89b9b90b46c628c300dd98fc68e98a18d77
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://urbanelect.com/userfiles/file/88180213511.pdf In PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/nilasogefadenata.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/dawerazefuwanubazitoxiraf.pdfIn PDF document text
    • http://montesantangelo.it/files/files/bajukevokok.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c64ae845a---xojafewesujokaseweketo.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410b512eb88---47908159695.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/47100373887.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/96606986617.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/72331665118.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/vovebe.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/toboza.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/vurixa.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/99637121260.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/todaje.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/97811857518.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/cdf284247ba6d5f7096fad363d23f640/sevut.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/nesabuxuwivez.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/65786017467.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/jimoparavivo.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/94106819802.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/waveremuki.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/38205668806.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/xogabuvotekedos.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/p169e78mdcegcsek6qnk99i6eg/gogubidagal.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/32978079315.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=alone+together+maya+angelouPDF 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_off0000b705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB705 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF17 15688 bytes
SHA-256: bc765c57f7a3387922b59c58e153e79f6a27f9d8057475ea8d24c2e97bfff826
font_02_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 10488 bytes
SHA-256: 471446f233c2d3938239dbd9409788d339c92cc26cc7f566910bac6f6c0a5729

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