Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fdd7b39ac1c6f3…

MALICIOUS

PDF

84.7 KB Created: 2021-09-12 17:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cf1ce5ac578ee2cdfdf1f51da4ef39e5 SHA-1: d95e6bfb99183eae306fb5ceba585818eb43a2db SHA-256: e2fdd7b39ac1c6f34392e6904105cc1f0ce21be741e5ff7d5c781759a4887143
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate the presence of a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=circular+progress+bar+in+android+example PDF link annotation
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/pelirelugifazeraku.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af2bc8cd4d---dijinepefojenikidamibazer.pdfIn PDF document text
    • http://guowangcable.com/d/files/31257852650.pdfIn PDF document text
    • http://teresachild.com/upload/files/bakuwagafexegivuwi.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/jodalerive.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/jinugomumusuwilotow.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/pupiregumijelevesami.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210905182945.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613aaeb88b96e---77622487432.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/46801358545.pdfIn PDF document text
    • https://nomortiga.com/contents/files/tofikisiwinuzux.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/sunarimipiluzanemozudime.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/17194742943.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/48341563725.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/94758045461.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/70423225412.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613db75e25aca---ziletixuwuzete.pdfIn PDF document text
    • http://www.77ice.com/upload/files/4430377402.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/71970643702.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/fegizobexezenezew.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/86678987069.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378568713e8---29493505513.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/buruxu.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/notegis.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_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 11132 bytes
SHA-256: cb9032b58656cfa392320af7294cf4a03d1b8dbf1b778237471620e6b2f85fee
font_01_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F5 19124 bytes
SHA-256: e175a844f769f26faf0d3acc55af06ac0198db9d30708775b766e0dc983b815c

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