Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a7601e9ddd1c94…

MALICIOUS

PDF

79.2 KB Created: 2021-10-22 16:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 85aa63547e0c9e143db353ecf8d8e79f SHA-1: 337d5435c690ff41f4e0a5ac24d9e8602670a925 SHA-256: 62a7601e9ddd1c94fc2a494188ab8fc978262664761a7c841fdfe1b8bc3273c4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://studiopedrazzini.eu/userfiles/files/zebowuxibepuwiz.pdf In PDF document text
    • https://hasekei.jp/userfiles/file/mumebumiwug.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/72326796511.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/60227273197.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/leranozuwufijemuk.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/70837425630.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161604e5538b94---pamalikutugazovowi.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/63485734186.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/zotekabo.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16171aeb3893f5---gejelinutozumemuk.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/ralixo.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/11290658806.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/80765488029.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/29872797154.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/gazuravi.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/1324207407.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/33675068819.pdfIn PDF document text
    • https://x-software.cz/data/file/lutedosawosukiz.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/3p5o0nrfrfu80i11vgjh6d2mnt/86667332958.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/60666559866.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/20204480282.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/72582277418.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/pi5j47pt197p7sfa845jmso3cq/61911836881.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/lezerawumetilokupexomureg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/7xhmvLXWVJc/uplcv?utm_term=baby+princess+celestia+coloring+pagesPDF 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_off0000d1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 10856 bytes
SHA-256: d47d4f6e948a8a749d0b593fd15cc680b9054fc2bf6f6ce9f2a5d3816495cf22
font_02_sfnt_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 16888 bytes
SHA-256: 906cf5bd768c818eb1ed86f04c34fc424015fe49e72005e69e7975b027be8f69

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