Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7df5977e4780bb7…

MALICIOUS

PDF

82.3 KB Created: 2021-09-15 14:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e9f681b4cec919108eb05d47d74ad96 SHA-1: ce7f08e0ee6314f9c912468b2dcfd8f95f0cd69f SHA-256: e7df5977e4780bb763cc60bd3090a7f900fd335f358abe392521d6dc6d64f7b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple external URIs and link farms points to an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=download+bleach+immortal+soul+apk PDF link annotation
    • https://newtech-utm.pl/userfiles/file/bevugunukemo.pdfIn PDF document text
    • https://best-label.com/upload/files/81558201397.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141530d26a1f---besiwivimizadususaxuguwaj.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202109/file/1631054861.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/kunajisoses.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/wolakibiz.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210905_151430.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/kubuvazivuzufozex.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecd30aac59---16554540315.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/89483642538.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/vevusuwanok.pdfIn PDF document text
    • https://tiemhoamo.tiemhoahaibara.com/data/dulieu/files/kezasur.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/18496430345.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/pilagejenunezajuku.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wumanu.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/vuzifawobozabotuf.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/xobabetizebidiwanetavofuz.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/69179698407.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/dofezofukovar.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/jaxixurapajevub.pdfIn PDF document text
    • http://tuyothuyluc.vn/webroot/img/files/zolep.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf34f68e50---28367189212.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/26673507859.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/jorepegefivezi.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/mujajilikabimogapif.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_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 17908 bytes
SHA-256: 37661128659b24c1cc4d8e2b8d94b2402eddc01d1b26ce7c9355fd91df264a3a
font_01_sfnt_off0001092d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092D 11196 bytes
SHA-256: 5cd5cdc10ab3a321977e7ce321c34a6e1ec53386a3802d878e9d674e2eb18d3b
font_02_sfnt_off00012301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12301 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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