Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f749c14ade663b…

MALICIOUS

PDF

85.3 KB Created: 2021-09-11 07:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6bf4a318fe8369cb946d2041d1d6f7b1 SHA-1: 25da3e96c69994b86b71b8d48595bfe97a1d6317 SHA-256: 22f749c14ade663b78007577962155d30c0d87b9da1200bcca977fa0b63da448
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to lead users to potentially malicious content, aligning with phishing or malware distribution tactics. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/f5fd2994709c85f8328a37a2ebab8543/57776886497.pdf In PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdff8a1ad8---jobarasumesis.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/37586691596.pdfIn PDF document text
    • https://synersys.fr/contenu/file/33751622003.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/42391342319.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/32ca1f37c4ef490f79937e2b740d753f/30094431899.pdfIn PDF document text
    • https://iword.de/userfiles/file/mabofuragal.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/gokijadovid.pdfIn PDF document text
    • https://foulardfotografando.it/file/rifurujebutegexofew.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613526f84653b---wunufavatenikujajela.pdfIn PDF document text
    • http://zenkatsu.dk/files/giduteto.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/9796c45b23e3eebf2c149adb5254c398/91635853592.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613254df6fe91---59716537613.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd790a1240---84001131527.pdfIn PDF document text
    • http://houselandia.ru/files/37229671889.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/minoluxufuvusugamovineki.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/78860922117.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/93459865963.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/supebutepobegupenebeg.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/lamuvizalevuxu.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/difazazo.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/pirepen.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/67d6580135ed613c5d1fada4fd33052f/18566465115.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/01ab14968993e4324901eb45fb821b4b/tijapilitipevusonekad.pdfIn PDF document text
    • https://ibextrail.com/editor-images/35843889716.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/muvifinoferug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=app+to+play+m4b+on+androidPDF 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_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 17332 bytes
SHA-256: 69ad076d0c69a2cf9b5c52f9a9932e76e6f8e4ba47a7bc54883cff7cb28b3add
font_01_sfnt_off000117ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EC 10568 bytes
SHA-256: be280482e74f18b949edfa788232e667d9cb822828a31ccd122330815c27c8d2
font_02_sfnt_off00012fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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