Malicious PDF — malware analysis report

Static analysis result for SHA-256 0097628e4963a466…

MALICIOUS

PDF

107.5 KB Created: 2021-08-22 06:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5b7dd3b0ed5f5abca64abc70051858e9 SHA-1: e17741cdf51fed48798c80a383c27dc50371a760 SHA-256: 0097628e4963a4667a651471f59a45a7c8f86195b712940d71288dd18850bfb1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/b7c1f9c705a51713852ff696c074816d/muvipeva.pdf In PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/a7e817950f0a5e14f74ac2538938d1cb/92608295046.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/498c9d556f5094395beb7b82f698b2b7/wigawevizoladuw.pdfIn PDF document text
    • http://planetamama.ru/files/file/16700114837.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/28374825519.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160adc0a07d387---naripalobetovifolariwak.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/4trbj7nfbhuq5bupfn0srgfbg5/50416320101.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/tevanebizusax.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/73838397735.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f62d29d8cae---vimadotawekotaselabelin.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/poboposokovibuw.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/menizulonugatufonavedow.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210727073547_ehnv38.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/e7818tios0semjljv0gj5l07r5/20238293433.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/disefagudaru.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/bunavigo.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/15467254387.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/xisatalunezetunoxam.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac36a759c---56006683039.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/sulifunilukifina.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/mojirukomuputopu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ielts+writing+task+2+general+samples+pdfPDF 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_off0001430f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430F 10968 bytes
SHA-256: 9ebdbdae0e034be92bcedbed298368d8e96d37bf5025805001c64f77ec77d1cc
font_01_sfnt_off00015c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001747a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1747A 16164 bytes
SHA-256: b8cde8747ed1b021ee6de5e4919523d54dfcfe70b9d7d091696102c4292340c2

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