Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e23b46356b009dc…

MALICIOUS

PDF

216.6 KB Created: 2021-08-13 10:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 818d8013d27cd5ed51e8253f07a5168a SHA-1: 4514b709eeff1c27dbd3b9b0d8c22eee524801c1 SHA-256: 9e23b46356b009dc87f4e66d093d3414d50a28322471e029f48453afba41c348
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious content. The presence of these links indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a47adc2ab1a---lijosatelejeragikomir.pdf In PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607597d07cb94---21609945955.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/4b6763975ba3448f27a605e09d3398b1/39724933669.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724cb1c7d7b---2332722145.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4d72db427b970f15dc34637339a08057/xejubesukisewogilepelulo.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/d8cc5ba653df20ee1f86882ceda2c983/xudisifijotit.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161098e159164a---fadezunafala.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086390da16f9---pafesopenasu.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/363574f6302e552b7154c46107ab1210/30752504222.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/xorotetaposeminowebol.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/52973703334.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3b2109eb44fff16c587abbc88a5dcfdc/rujojululirezite.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dbee437c4---jamaxavimofowa.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/45763607394.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/56686259869.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/gopamisizuzane.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/a0fcb155e478708ac3b0886ba6081475/tunutuzosukaledezazibe.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/kesored.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb8c621121---86723110923.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/kapekasikijoxoxivuj.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edbcf6bca21---sufirogizojoxawowexal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+frog+and+the+mouse+answersPDF 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_off0002f621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00030e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E38 10812 bytes
SHA-256: dfc64c88a023e5882f0255ce69fd560aca147e6b4eec513b4892e9b284f9ced0
font_02_sfnt_off000326db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326DB 17564 bytes
SHA-256: 12e5d0fb3b85db79aefc21afcf1c3470bc259624932102b128771b0058d13642