Malicious PDF — malware analysis report

Static analysis result for SHA-256 6304d11a3c62fc1e…

MALICIOUS

PDF

84.6 KB Created: 2021-09-03 04:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c1ca5969c143be23291e0c3fcbd6ec76 SHA-1: 6778927db86c5cf02bb4c07301f1510d9153c594 SHA-256: 6304d11a3c62fc1edec54524de984c134794737da4e0fac4147f3ba228329949
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfdd4c691d2---37082921810.pdf In PDF document text
    • https://humicdp.com/uploads/2021-07-03/images/files/89486993888.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f428f78a61---13103327703.pdfIn PDF document text
    • http://tms-operation.com/upload/files/jovizuzilifoxafogidaxesus.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/rubejemusi.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/k7c8d50nenk55ag02ircv576lu/kowexajiri.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/65805094555.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/63841988742.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608062901eaf1---85537320732.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a948bea92fa---wesenojinadaxolaxure.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086120f1e188---rujupogupolunomewa.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/68eif6k5kecmkq9rjbdgoce1p7/66257960907.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c10439d766e---92726772985.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/pofumikikurujagezejalo.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/p1rk7m4cblaal0uqa6tcnb3s0i/65851862904.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f6a4e0f5a---zipufitapeninenagubinelaj.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/49871606330.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/42003778668.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ddce9d010---58494732678.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/lanama.pdfIn PDF document text
    • http://cortabellanews.com/userimages/mukola.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a78b4950174---8255786724.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/450dc4963079258ae19e47dbf39bc065/57056565085.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c73d6827bc0---jopimabutebaxemugekeribum.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/2f7ec33127d9a7483818513682d64f5c/sepakugex.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/lakitapagatogu.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/rinenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=nissan+frontier+2000+owners+manualPDF 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_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 10780 bytes
SHA-256: bcde565c840b7c877747264eaff8cf2cc87c831015ba075759a42523d05b59e0
font_02_sfnt_off00011762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 17568 bytes
SHA-256: cf17f1806c76ac9ff97f2e2f75be66481f357b9ed22868558c10eb868c776e39

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