Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c01d26ace4d9eb3…

MALICIOUS

PDF

79.3 KB Created: 2021-09-01 07:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8f0c3b1df0c146cb6022532fa26bb28f SHA-1: 6b10575ade1407e9bde23ed54cda16b980633bad SHA-256: 2c01d26ace4d9eb3b8f2b30da820ad4d06635187492eeba67c09c70e88e67ac5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to compromised or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farm heuristics indicates an attempt to lure users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://eastmanllc.com/ckfinder/userfiles/files/19639746735.pdf In PDF document text
    • https://lawyerupsmart.com/tempimg/file/49044646265.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dd6485fae---kuviwopasebezuduzivedi.pdfIn PDF document text
    • https://bursac.net/userfiles/file/83327720882.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/tiwumavub.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094496826ad6---89360554801.pdfIn PDF document text
    • http://elma1.ru/!upload/files/13664789261.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/6476ea6c82f7f0a8c298027f9dcfe162/98477205903.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/puxadatilotasazat.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/vexunidopew.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/6504196a1a53863adedbc57ce49a550d/jonafogovokosuxaxel.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/82406169893.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/ludir.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/pilafexukoburusagar.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/16786393433.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/19dab11eebc0b56cbd5b4916475a7a2f/19839850346.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/4475567158.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/wimurajasel.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a3640f0f8d3---45350669670.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/powolekodi.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c67d050b624---81395520889.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5991870ada---20618200161.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/datelowewegonogowiwod.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/lasutotomo.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9935c756854aa39404bc5eb58afcc2bd/35996848932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=five+forces+template+wordPDF 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_off0000cddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 10808 bytes
SHA-256: 78267ad86db24711a65bd2d23f1140d757864aea860bc1528c34134a9281f174
font_02_sfnt_off0000fefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFD 18960 bytes
SHA-256: 5fcdf9c7de2de31802ee85d8afd28fede8ecf59bdaf946c5cbc12949dd9b1a1d

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