Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b07a36e5fd0c30…

MALICIOUS

PDF

110.0 KB Created: 2021-09-19 18:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eecf393caafc4562d706890d82915425 SHA-1: ecd9e69cbccee3b0fcaa712ea8a48df08f6db14a SHA-256: 46b07a36e5fd0c306aed14ee2ac0921fb6ff416c5cc4b61d23cc7370aa0a3ce1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised CMS uploads. The primary purpose seems to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://allytemp.ru/uplcv?utm_term=master+ball+cheat+code+in+pokemon+emerald PDF link annotation
    • http://oecschool.com/userfiles/file/muzaralorepibeganul.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/nezuboxizoxo.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161416338efea7---punurimoledifegugavif.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/seresomiwaduzugevuwiw.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/56072781910.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b892cea9f---makoxirom.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/40641532165.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/a1342fd24373384ba374098dc87a426a/4295801092.pdfIn PDF document text
    • http://gensugroup.com/upload/files/rukikogatutem.pdfIn PDF document text
    • https://securitydm.com/slicice/file/64430715737.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/68322068511.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/fcf0ae06d986a3cc76024f3cf8f86ef0/ligavupigomajajijubunuju.pdfIn PDF document text
    • https://nistd.in/userfiles/file/dekiputeb.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/pugikolodiz.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/sobenasiratavuguriz.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/72670743621.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/18418056439.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/karasoka.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/8d66aa2cfe4c4d280e16e18d5f7b9b3b/zufijapivakanefapi.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/37847544366.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/ruvogatopoginufenexizuxoj.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/wusibesalixalazeteki.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/nelopemowupitimonitifag.pdfIn PDF document text
    • 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_off00014828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14828 18472 bytes
SHA-256: 19aa185da45f09732779b94dd3941f54163485cfeed76cb8a263c70d7b741347
font_01_sfnt_off000178a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000190b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190B9 11004 bytes
SHA-256: a0dc7ca51c23f1f254105f4ac3c289ffd131b779b7721303f1f24e995308d8a4

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