Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f19e91a207c35a…

MALICIOUS

PDF

84.3 KB Created: 2021-09-11 20:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a0a6b9cbda09590a0b4dfdef2bc75861 SHA-1: 11fee24674f44a5de7249d8f66e382275ba29b6e SHA-256: 48f19e91a207c35ab8ec3eaf4905b5ff96b134e03f65ea855f355f7659eacfad
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The presence of numerous external URIs, including one pointing to 'kingsauto-bar.com', indicates a potential phishing or redirection attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further suggests a pattern of using disposable domains for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://kingsauto-bar.com/js/upload/files/58691048897.pdf In PDF document text
    • http://kengosushionlineorder.com/uploads/files/57375904070.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/mupufiti.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/pizejeluwagizurevubazip.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/29006541980.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/levevelotinejeze.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/39666979023.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353625872ac---90950815504.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/66417672865.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/69779811605.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/zujidepuf.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/8486170215.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/65493656561.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/21459539176.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/nefaxazirulunaletas.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090701243373499.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/serumezuwuxudov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tom+and+jerry+the+christmas+chase+full+moviePDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613339e084f9f---48825420652.pdfIn PDF document text
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/lizewuzarobiwop.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_off0000e49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49A 11112 bytes
SHA-256: 408960bdd0e7cbd23bcae6644ab27b625237c2ee85fb1c07c572c59f628d26d6
font_01_sfnt_off0000fe57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11669 17524 bytes
SHA-256: 9bb25a2f339be237faab25dd91e3b1d00f145fcffc1bf5a6b7d6bea51f2686a8

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