Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d44a0bd2f92c8f…

MALICIOUS

PDF

84.7 KB Created: 2021-09-17 18:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9a21bfbc7460fdc9751dd6d845c4df1c SHA-1: 6cbaf7b993ef343d8313812614bdcc05234292bc SHA-256: e0d44a0bd2f92c8f5e82133b74c2814f83aaec17fec6f03852b0ddf66cd04e19
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to potentially compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites via the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://berallebags.com/UploadFiles/FCKeditor/20210913083617.pdf In PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d1649ecbc---sesenufupilutejenuxo.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/42897544126.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/bijolumobeduxolopolop.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/geruwelilavaxofob.pdfIn PDF document text
    • https://wineart.online/userfiles/file/90545766078.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/kokajefojek.pdfIn PDF document text
    • http://imi.vc/upload/files/gexenogaminurixejakev.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/lorisegu.pdfIn PDF document text
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/zidemexuviruzolakox.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/84hqf00g5oo2mscetq1jgjqrkc/fefoxiv.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/navifofupidufokanewa.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0a533ee8c---8153150231.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/murovo.pdfIn PDF document text
    • http://samtle.net/ckupload/files/laxojexafom.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/sewabotuvupanaxuzerotexap.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/nugenagepozizurupo.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/mufogikejikuguk.pdfPDF link annotation
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/bbf121e508d1970ea6d29264f6b5220f/55638728616.pdfIn PDF document text
    • http://northcity.rs/slike/files/popupinenadagas.pdfIn PDF document text
    • http://cmtsport.com/pliki/pevefezavepel.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/lazokerezamola.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/posudisijikuvuzoso.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/44040780172.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/pixupikixulolezajezes.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613253d791c44---kodurimegimovajukusatita.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/8651549650.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=city+construction+simulator+forklift+truck+game+mod+apkPDF 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_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 11300 bytes
SHA-256: d4d95168b0009bb4c2a27f24d9fbb4c894cdd6a58a4dae1fc5d952250b027435
font_02_sfnt_off00011526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11526 18076 bytes
SHA-256: a588ad66cec02adf39c64105a7805bf67a0234539589b7e379a4f91b68c83ca8