Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64f756cfc6a0499…

MALICIOUS

PDF

136.3 KB Created: 2021-08-03 11:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d505803f2b92bc4338423f61c1a1a62f SHA-1: 6f084b514dfb2062a6e36cb995a8a880a2fd2c75 SHA-256: f64f756cfc6a04999470efefd6017047eca95d068143da86b8c5dc99f914f268
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and a link farm heuristic confirms the primary attack vector involves directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=linea+del+tiempo+de+antecedentes+de+las+finanzas+p%C3%BAblicas PDF link annotation
    • https://lotteppta.com/beta/assets/file/kinusilupowewogopipe.pdfIn PDF document text
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/dudupunibewefodekod.pdfIn PDF document text
    • https://museos.comarcadelasierradealbarracin.es/ckfinder/userfiles/files/daludanoretobamegid.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0c36cd229---monujubilanuxagunimijub.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/851ced190e08f9dad2fb79e9a98dd1b8/mebexewutejakar.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/2352e72c2b304d3f9fe5ce31332e4632/litalagazejupamudafujaw.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/ce3943eabf9c8e1eff2dab3183eb65d9/12414402246.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/9d544e9187eff27e26c7c4ae00914976/94117360036.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776fea3719f---86741157915.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/58610776583.pdfIn PDF document text
    • http://mobilenmr.com/files/files/79769119742.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/24742094604.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fdf69403c---fujumopigobonuvo.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/kubazirabamuzeze.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/84dkgeethd7doeog73378s2r67/89468481048.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/25957482890.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/nenajorulememewevijolob.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/60d9e77969bc583d700918785d41c472/42759138992.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/wubodasinidebuganonenizut.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/pj7uakm2mt2cpn5096vlj7uktl/19968367363.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/kajorodilibonugumobuzitu.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/7752297674.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607046b951ab0---3852145488.pdfIn PDF document text
    • http://www.netcorp.hu/data/editorfile/49776782981.pdfIn PDF document text
    • https://senhewood.com/d/files/dimewivumavikowovijisa.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_off0001ae65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE65 10952 bytes
SHA-256: fe415586b7cb98fc055a794ba171b8b363da68a3966dc938964a535ad7ed0a71
font_01_sfnt_off0001c78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C78C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001df9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF9E 18380 bytes
SHA-256: 7fc1b49955f893712c32d79112db9fd2927771ed65958ebbbd52f2cdeb8a48ed

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