Malicious PDF — malware analysis report

Static analysis result for SHA-256 9067785c8180355c…

MALICIOUS

PDF

103.8 KB Created: 2021-07-20 23:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a4beb1e992c906cd1409d81e7e438e49 SHA-1: 9543c4faee2f9fe202d0fa432dbda6d9f528ef7a SHA-256: 9067785c8180355c68b74b46a03549ecd18d819c593eb4f0ee33d31e87547388
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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://wardwrightself.com/clients/863644/File/dobarirumoroxoloti.pdf In PDF document text
    • https://cooperspick.com/files/majeritijenajajorukel.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/tc8eanb8k931fpfhulnj6sr1q7/wanutekezenifozuripividu.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/jemajazufutasem.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/zagoma.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f6f3b6f2d---mofetibazudakadezugo.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609303b60f147---39503106438.pdfIn PDF document text
    • https://goldenapp.net/file/jubijamogopuwimezi.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/bujewesuxite.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b123277161b---benirodivegosoj.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/66885687567.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/zozedup.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ca0f04b93398489df438bdbf9efbd547/mujiwumovifip.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/39130266019.pdfIn PDF document text
    • https://seikico.net/img-tym/files/budarikivipibuletuvagov.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/rivoruxegezulida.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/fcc05b0da64417f68e1ebbb7e4468767/zosapawuzosesivenax.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/59409291242.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/80245335560.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df828b4b9d4---sifefetu.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/49154546504.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160726dcb003ad---sibupudoxudunuxu.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa95d063f15---xurupozeteve.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/xabemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=to+void+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000133b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x133B9 18892 bytes
SHA-256: fbcce5e9a269613649c3c70f06e7b70a1fc9611f21f98482262b5fe2f8ebbcf1
font_00_sfnt_off0000f5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 10208 bytes
SHA-256: 4d488406916d4165b9a2a05b31a15e9ce1c110501bdd16d7624cc7131013f7c6
font_01_sfnt_off00010c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C49 4088 bytes
SHA-256: e805b82a703b71c828afad2cb90ab367ec87d82b8735d553084bb9002d31bc4c
font_02_sfnt_off00011ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00015365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15365 25196 bytes
SHA-256: dcb2332ac378d6814571466422b5009633adf113ef7a4fa4a9915e1bf8f093ea

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