Malicious PDF — malware analysis report

Static analysis result for SHA-256 1863eeec4a24a6a3…

MALICIOUS

PDF

87.0 KB Created: 2021-08-31 15:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f6a80aff0b3d2b2466fe5145f1dff124 SHA-1: 6ecea533361ff6290dbf6f264f9ade1d01b981ab SHA-256: 1863eeec4a24a6a3b28b81c16d1b2e8071b5ea8b761a11eaaf8ae91c42d59375
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, 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 distribution. No scripts were extracted, but the PDF structure itself facilitates the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://absolutelyneon.com/userfiles/file/rajusip.pdf In PDF document text
    • http://www.aadhar-interior.com/userfiles/file/timesovifi.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/189468497.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/zagukudokitusofudem.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/vkv1vtg6sprtmn5102qrq5tovq/refagoxelije.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/kudukinurafigebubujafaro.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/207467642360bb74c85dded.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/bugabe.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/95907700329.pdfIn PDF document text
    • https://patc.fr/imagesfile/mipemegekireg.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/cac766b9e5c8107e22a9587937c8ba79/10497877781.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/dagap.pdfIn PDF document text
    • http://onelove.cz/file/rarifufumovirawenikot.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/vufimarijawi.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/cue8ejrecln9soluqenfgb5jm7/wesazufanuka.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/94414529100.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/10466570538.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ec0a56e9e---famob.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/77099866764.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/674a46dcf3c505a282d2c790600e2563/54471279892.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/83341204560.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/zivotewi.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/1c1751f13c42a771b9da8eb54e588ab9/koxoxejenumudomevoxodanub.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161293900c9a23---13264332359.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/4b65dec62a0c178b8ed0e7b9b1554bf7/44769434224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=functionalist+theory+of+socializationPDF 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_off0000ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 17888 bytes
SHA-256: ee0351632ce37bdda55454bb562a2c7bc346d844e6e73d3d28398040dae17722
font_01_sfnt_off00011c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1A 10684 bytes
SHA-256: 649bad6630c5d27e4efc8d78f19c1470b17c845cac971c2d15da5e371d9036d8
font_02_sfnt_off0001349e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.