Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d018606e436fac…

MALICIOUS

PDF

78.0 KB Created: 2021-09-12 05:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c2713885b9c507b5d17c467c18bd95db SHA-1: 305a45f549040a7d1f487e898d6ad73c40b48dd8 SHA-256: 01d018606e436fac8e89d8cc8d1b8eae2566507960d41fe783373f12c7e06666
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://kawanmto.net/contents/files/fukoxoxumoruxomil.pdf In PDF document text
    • https://davidfoleyinc.com/userfiles/file/50733052278.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/vikatasuzosotixusiwit.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/48708886271.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/96444080301.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210908123534963.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/raxawitavikapemin.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/80664543628.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/50983295178.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/32482706320.pdfIn PDF document text
    • http://premo.at/userfiles/file/zesefuve.pdfIn PDF document text
    • http://progetec.org/userfiles/files/maxafodedozuxowifo.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/77300502586.pdfIn PDF document text
    • https://rjpexport.com/files/melojejuwojibubef.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/27134992856.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/54402178773.pdfIn PDF document text
    • https://superchills.com/userfiles/file/55205442249.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/danin.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/89513520276.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161324d1405a38---nikutir.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133358909065---likiladorib.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/12840227191.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/ripivekilobimiresorojixi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd5359fd07---12107376277.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/ramojubupagi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=bollywood+movie+2020+mp3+song+download+pagalworld+comPDF 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_off0000cb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB25 11492 bytes
SHA-256: 9624d955f303a1045af979cd9847edbf5c774d3022413dc7f7a82c4e96fc9cd6
font_01_sfnt_off0000e634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 16736 bytes
SHA-256: 4aa9f2f8602fbe895791fa805ac82e986802c65b3620fe3fa681cf1073c43066
font_02_sfnt_off0001118a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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