Malicious PDF — malware analysis report

Static analysis result for SHA-256 804ac9a5f4058228…

MALICIOUS

PDF

77.9 KB Created: 2021-06-29 17:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 867febec7e5b984be23f49a29f65bd84 SHA-1: adc2158461e1a2ec78bf045e1402488732779a03 SHA-256: 804ac9a5f4058228ed5eedf2385e8762a6bbc34f0dac0391b296f841f84e4dc4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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.
  • 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://agro-partner.com/Image/files/13601936947.pdf
    • https://luyenthitoeic.info/userfiles/file/96459371486.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/zuniwepefogerewuvivolizon.pdf
    • http://diversecityuk.com/userfiles/file/bebisoxarugexuxapaziwez.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/b9720ba0d75f9af9f7f7310d0028d50f/8943918752.pdf
    • https://psfund.org/public/uploads/files/cms_files/fametezisipubitu.pdf
    • https://chmelo.hu/sites/default/files/file/puvof.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86c45b19b9---bukusadubewamolilaribid.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/fe7238ab81b58a713c04de108fdc6920/2632130024.pdf
    • https://deniz-sogutma.org/img/userfiles/file/46839186735.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/65972916012.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c65045ef63f9616558fa865b34ac5e55/sukolefupeberi.pdf
    • https://alamansyria.com/userfiles/file/48969550642.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcbcbd73ff---6938817508.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc59db90e---bivifewafax.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/si0vduqrk8hth25gchbvpnhvgv/nuwisirazebokux.pdf
    • http://bvsaigonbinhduong.vn/uploads/files/32586374631.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bafa193fa---29098363944.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608775c965bf7---nobavumixo.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ffdf08017---xovasabit.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cfb4954be8e6fe4af4b2341e5fdf542f/4768609561.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/in3qaa43m716b6l4e9mkbljtn7/7377752615.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609847293dd95---12853607917.pdf
    • http://danchrisjewelry.com/userfiles/file/fegujofupote.pdf
    • https://asiarsolutions.com/userfiles/file/79235393044.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=christos+bar+and+grill
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD04 16792 bytes
font_01_sfnt_off0000e51b.bin
073d81058c1a0a7527a729a9d882fab8cbceee0f3f48752f80878a851c59c71a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 10564 bytes
font_02_sfnt_off0000fce2.bin
122fca10603f328f580fc7779dea2304033f8df2fbc3a5fa688aec7dd5d3cf9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 17528 bytes