Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ed1e575f295ddd…

MALICIOUS

PDF

79.3 KB Created: 2021-07-15 11:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 66f9812bf07082d6525a24ebd6ee780a SHA-1: b80c43ba0766727cc97d242d7ff0bcb22384b5fe SHA-256: 49ed1e575f295ddd72d78b264b42bc7402bfa19a067ea1f2b8b4a48f69b63ec0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous URLs, many pointing to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://smidgel.ru/uplcv?utm_term=pdf+to+word+converter+online+free+instant+without+email PDF link annotation
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e1e65f7da---fepazepatijexuluzatizu.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/7381853939.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/netoliladuvapekozux.pdfIn PDF document text
    • https://mmszke.hu/files/file/saninege.pdfIn PDF document text
    • https://x-software.cz/data/file/disenapituragudatafera.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/31848914804.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/jopobimabonebibixifogedun.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0a91d96f9---21277007514.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/teluzedobexumez.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/569434825.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608252b8d43c8---gufabugavifetakiworimeki.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16081cd9c5968f---zakuv.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d4272a94a---21524307059.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/kikumabosawapezoxibaji.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/10880802910.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096e5e5cf35d---59304205015.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b535324a42---miliguzetomov.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/d459da45792242219106516f04fed428/rufogetotis.pdfIn PDF document text
    • http://beateromer.com/bilder/file/dosuvulafesazug.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af90b7b003---jalifapukegotalimelikum.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/borujijidilo.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_off0000d0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A8 17244 bytes
SHA-256: a40db6a175a5b5da3a2bad1824ef69160618fbdc7963639632b7d9f78864a49b
font_01_sfnt_off0000fe0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11624 10996 bytes
SHA-256: 5655dd1549a5f26b98e465a98750c3592e46e2b810d627aeafadfe7bc53c0414

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