Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccea0d702f6ad527…

MALICIOUS

PDF

84.9 KB Created: 2021-09-05 09:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4c7cc62d036a48c3cf6b93622977b699 SHA-1: 0e988e2bbb11692102c4ccecc1d7b8363a02ddfc SHA-256: ccea0d702f6ad527ddf85bda5e1c5bbb551271f9466c636c604991a12b6de8ef
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF link farm heuristics indicates a deliberate effort to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://schilderlesvakantie.nl/ckfinder/userfiles/files/betinokobogem.pdf In PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/sapajemivukewed.pdfIn PDF document text
    • https://foulardfotografando.it/file/89446339335.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/99373672266.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c71069b550---jawaxupo.pdfIn PDF document text
    • http://gabortech.com/admin/file/19469228294.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1926a24828dfb6fc30e8aa9956c6a15a/jipitinikeniru.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b2d13504fff23c9717ba5e5a3b7b929e/kagidim.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb579d292d---16173589516.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecc03131be---56798130345.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/rovalekiluzizaxafa.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16093edf8af9f7---vamemomadujirenisafir.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/pigajubopivawinivuvoj.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/zadaxa.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/27553307389.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094d6a44ea55---boxapaligazut.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d63b9c2df1---lunutasaxiden.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/53078938896.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/fd7ub2bs5gnfamagdiig8f5588/65069267252.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/55985026326.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/gopigobesazaluru.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/ledatatuwoxom.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/zeromamalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=manualidades+con+tubos+de+papel+higienico+portalapicesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF1 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560
font_01_sfnt_off0000e3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 11024 bytes
SHA-256: 12d961011056ba3bbe2802dc95227c8f08883cf7d2ba92cd587a1612085f8416
font_02_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 18336 bytes
SHA-256: 9b637297dce29b81944a91aedbf4b44ab45e2c93326cb8e8fd331255e90f99ee
font_03_sfnt_off00012b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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