Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0481faee1ce26a1…

MALICIOUS

PDF

91.1 KB Created: 2021-06-29 04:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1f42a34bb23f7327a47dbd5a7d89f489 SHA-1: f5d77fa91a5eadbf8f29df127b7b53e913b326e8 SHA-256: b0481faee1ce26a144356bfc56ef44d5e38f2bbed46b674d2eda015b34691ac2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to lure users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=read+the+poem+and+answer+the+questions+for+grade+3 PDF link annotation
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c2fb1e106---13145045790.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/a0jnmuqkbbio98ggjfaufvnf12/85391318856.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/286010885.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/18626458298.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/81359966857.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/qgiac86q5csbq3flqklkcfg3r7/80329217222.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/53821944938.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/kegavitesowe.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d022f5bf8e---39490159798.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/bbd50906cc97d03d1d676b6d274d1a02/xewewage.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0a0b83fc8---99015467605.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/40927655800.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/819b9b36d06dc0942e45fe93a2769068/31919235375.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861d3cbd94d---texurumojenividanupuz.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/9fbf13826e6f065c4e20db1a28e50890/xomalugevilorirurowis.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/17e61a4d57796dd3448dc83028e75285/xinokalolewukabitegaran.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//47182040295.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/07ecb8d7ccdb8a4e4b6d537b48cfebef/5722793393.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/ck8pqel2ne1o9h2t91qn37je4e/21984932387.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/2d0eor80el4efkfbkd3sjbkn25/bejavu.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/82614036979.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/15627cb1695d699daac5e054bd22a86e/zebupikosukexubaribaref.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/62304782668.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/napakupufejenaxajosibozi.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/92580057176.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_off0000fe8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8C 11448 bytes
SHA-256: 31d02dcf235ddbaa2e4e20c9d69aa959281b2f58a711613a634ff9a6399a499c
font_01_sfnt_off000118f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F3 17416 bytes
SHA-256: a31f37f0dfe50a7bd464204c20767eb962408847a681307f731cdbe99ed08ece
font_02_sfnt_off000146ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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