Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f4ab19ff282cc2…

MALICIOUS

PDF

77.8 KB Created: 2021-08-29 21:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 98c4ef0fe20d5856987fe14790b0dc2c SHA-1: 08da08ab13620ff54a64d820007cfa203296ea80 SHA-256: e1f4ab19ff282cc2a72afabc46fa5d311cc5864f1a17c3289cd4dc05e3d39761
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves luring users to click on these links, which are hosted on various domains, some of which appear to be disposable or compromised.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://matchonusa.com/uploads/files/zejisurebepizari.pdf In PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3d662d87b6e2913bca3ea87359910be0/27891930071.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/9d359c1e5529bba71820249769e54aac/sapafibilimipixakapexa.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/55508207319.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ff169e0ff---45001248513.pdfIn PDF document text
    • http://gilleyfamilyreunion.com/clients/6/6c/6ce887ac6ce8bbcacf46524318b1f362/File/11541567026.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2adacea87---pojarixikowineparil.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/32645502370.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/bowenedi.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210617180535.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/7773873454.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/68495177725.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/loxulikuxele.pdfIn PDF document text
    • https://successalpha.team/upload/files/77397690842.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/88547361825.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/72789112225.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d77ecb3be---galapilunat.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/bofisununefixabo.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/ruxuvatidozapuxotipevuk.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a72dd5d6a---difupit.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/73060442972.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/27223008911.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/06032aaedbefcf12acb9270028b8d9ea/mawuligagojiv.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/zavadiwuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=liverpool+chauffeurs+limitedPDF link annotation
    • 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_off0000cb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB42 17356 bytes
SHA-256: 63c9c9c0616ef1ebf2b884c328b658e2d33a0140bb26dfa4cd3ea838651e8cc9
font_01_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11074 10904 bytes
SHA-256: 8339ddc235e9ac8db9d511ae5ef705c5f4e6c8ed38a881d321f23c685641361d

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