Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba0b0db80f2099d…

MALICIOUS

PDF

71.5 KB Created: 2021-09-02 19:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 007fc14cfe8601e9aecd93deca1bc059 SHA-1: d1e2384a7cdf2d563869220f97444317523cceca SHA-256: 7ba0b0db80f2099dda1f798adcca9adc1c4d353abc33e142dbd18154ec00fe67
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that host PDF files, many of which are hosted on potentially compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of multiple links to external resources suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://yournew.site/wp-content/plugins/super-forms/uploads/php/files/vscb8l7o8iaufdllvnsfs61tl8/90369077676.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1f7aaa252---lademuponeposazugu.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/sizilux.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080710e55c9f---ligixaxezobenufevaso.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866c3c614b3---35882280104.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/vuralafitevada.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/xaresuzepuxaluw.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/37302801772.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b9bc47136---78198107299.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/33551317559.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/dopurijotusot.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/t5hhkrjdfg3ing8pm4fh5snve0/furiwerawibut.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/a08k335sq0n41srsomv77a8qts/lekoridoxarirexuzivatos.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/29883546151.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/iu9j9ajon53go94ahq90hphcqk/47325364727.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f9df05a6b01---videwis.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/799e556f1cd359fd05eed48f8d544ba9/61691955074.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/0640f01e19ac92baec140109d8624ede/novixemijukezuvexosiwatun.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/jeduketune.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/beripetojorupenawaxedu.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/mewepujawapodafuk.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d32fa1380b---99718961686.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/fri9tqeb2tmc9h6175k8bcol0i/vutikejokelunolazifa.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/05cf67d3eb17a9f850bbfb2a2f691dee/27616051419.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=dred+scott+case+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_off0000b973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB973 15696 bytes
SHA-256: 35b643af99f138910272ced88cf96558bb00921f2dece8c3e85ccdbcb082b739
font_01_sfnt_off0000e114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE114 10372 bytes
SHA-256: 37857a396f254f18095e7998ddc386134a21a344f9e9f959fa0dd7ddc13e93d2
font_02_sfnt_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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