Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a48cebcab7f4d19…

MALICIOUS

PDF

74.0 KB Created: 2021-09-05 06:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c9a04ea10de3a849f666977b3d1c9d4 SHA-1: 29e7813095c669a347be47133c0bdd9f00e87912 SHA-256: 6a48cebcab7f4d1909814fdb535bc63e6822fc39b142d93e8f4a806d883200d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The numerous external URIs, many pointing to compromised WordPress sites, indicate a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • 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 https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbb3a3f703---vubavuvixujozurika.pdf In PDF document text
    • http://oresteruggiero.com/userfiles/files/12666520615.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160884bb99a032---jegupebux.pdfIn PDF document text
    • http://fpole.ru/sadm_files/60107934318.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/12158160629.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/t0o9g6hnmauou399osja1o0gs0/ripojopuridorujafis.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/dikusuguduvipupagu.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/36376666445.pdfIn PDF document text
    • http://teraval.cz/res/file/pexuferisopabeke.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/rupelodap.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad90090fe4c---defasizilafajotagonafep.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772bb525f58---biwupepobafumepojometam.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/76883004110.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/fiwijamege.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/32003527947.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/zenomudukaf.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba63be73522---noruratot.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/93968192695.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/4125092685.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/222fb6574f3b7aeb2cd3b3e1b21939ca/90921442449.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/kawopakivotoxax.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f3794f71b---zunozipemebamufoniw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=consumer+reports+air+purifier+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_off0000bdf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60E 10744 bytes
SHA-256: 345e0d816ef57e4926ae18e16de04a1697403bfeef16f3098208a5604b9b7ad2
font_02_sfnt_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 17108 bytes
SHA-256: 6047580bb2312d710b2aaa5d0622fb423e48ad237a29271602e7330db286c6fe

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