Malicious PDF — malware analysis report

Static analysis result for SHA-256 394be7e4606a487b…

MALICIOUS

PDF

90.4 KB Created: 2021-07-17 03:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0eea4d4ffa39a4fa2a285a0ee4a8aa92 SHA-1: 2a22751245b70dafabbb2e3ebfb2e417f7b473a5 SHA-256: 394be7e4606a487bedb75c4bb58ba9d180ed77a19dafb6a8bc2ea0841311407d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://curryleafharleysvillepa.com/hang/userfiles/files/lowotirumemo.pdf In PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/40818428454.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/modadagoxokuk.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/86834476275.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/vasalijufagutas.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/vetebukunipuxewu.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/revozevelurabomatolozax.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/tefiremefupi.pdfIn PDF document text
    • http://ibb-online.ru/f/file/43455724396.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/cb776237f1c23918e05005f7d9f04da3/dakupinixutuke.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70583d4deb---xukuzuvilop.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/cfce489a49af2b71fe043499df581afa/vezisefebe.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5b5c7fbb2---93676685548.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/vuvulinozofenewanunifo.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/zeneditul.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/21343092917.pdfIn PDF document text
    • https://termofriz.rs//files/95005010935.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab7ee160a2---89039594830.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-8/20210708082122205308.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/svhupmjkjn6t2tppljlhamgbpb/relatukokojetegaxewut.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b5604e5a---fobazesidi.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826e87027aa---66799615258.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/b136d4da780028b712fabf745407bbea/funowefefosilod.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/lajinoko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+walking+dead+our+world+cheats+2020PDF 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_off0000fc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC51 11132 bytes
SHA-256: 1d8fd0743b2e90555e5ce65003ccf1644f5619cc7cf97ac1c90b062a3089ab64
font_01_sfnt_off0001162f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E41 17404 bytes
SHA-256: 77e4509ab1f84b08fc655cc85986263dbb48bd81d96d231ba913c9e786a98d93

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