Malicious PDF — malware analysis report

Static analysis result for SHA-256 af599068a6ec1c70…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 00:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e1aa85c7646169a83f306f6aab3a192b SHA-1: 3185070761656f647bbc72caa7e32c9fa1d861cb SHA-256: af599068a6ec1c70b48d41dfe83c69f79d3607533e01167cf7b57d7eb824cb58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack by hosting these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=super+30+full+movie+download+website PDF link annotation
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/06d3a6b1cdf29c5cb4d38dba022c4757/gejeguzaxowikujuxuk.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/figer.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/lukerasolafofufuva.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/26814347093.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/8fgsjt53krkgb50er4gqh7rn2m/jeganuzamebaxevupoxemotaw.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614727cc10d9d---75492397640.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/11123039563.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/49179405532.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/kuxusijanatusul.pdfIn PDF document text
    • https://yifff.se/userfiles/file/pagibav.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/64626639864.pdfIn PDF document text
    • http://mrybalko.ru/files/xunilo.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/bifado.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/zuzop.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/31301727195.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/41988697292.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/e3b6f7de93824ad1bebe1fdaea045a5a/bugororiwemevaz.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/80951910893.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/guvisiduxedawufisezi.pdfIn PDF document text
    • http://praguetransfer.com/files/file/20726403412.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/lugumixe.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/14737257629.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/81689064998.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109040921524481.pdfIn PDF document text
    • 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_off0000aefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFC 16112 bytes
SHA-256: deec13ca7e84c5e52fa51622dc9ebbeba558a02252914ce2a765bd09ad1ca5b9
font_01_sfnt_off0000d81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81D 11420 bytes
SHA-256: 2914a5e57504be7d1fb38070867e0d216657de506003993362e7871ba0025adf
font_02_sfnt_off0000f2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1