Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7d4bd4e526d524…

MALICIOUS

PDF

83.5 KB Created: 2021-09-03 15:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7a2a0d0aa2a4bb87d48e550d35971b6e SHA-1: efba6f270fd3f604f74a14fa1eb7077d8df65373 SHA-256: fe7d4bd4e526d5247cee3e6adbc36b2b83ef182e0b583f3e1f9dfaf67d7e5daa
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URI links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ketchas.ru/uplcv?utm_term=pronunciacion+ingles+basico+pdf PDF link annotation
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fb7113ba5c85c00a212b477106e6b9a5/88644757215.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/49746667353.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/20635675843.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/75183144510.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/83036749462.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/zukobovazolar.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/95500449839.pdfPDF link annotation
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/q0vvlhtt0nks23tv3mdp0jq1q3/vugasexaligoreniwebexasoz.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160f050b02c693---sijemimonanudelutepafami.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/462485f3815aa33e8e7702a8ba4636d7/50842487573.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4818a3970f---dinilen.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/gokukozijo.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/rilediruvujigokawuvunube.pdfIn PDF document text
    • https://laser123.com/geektic/files/kinozanipopikizuvi.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/13836037958.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/7lp3s0eu35rk84r605gio01p1o/bavuzimo.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/83t83f968m3qh2fo66voh22cda/3899618211.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/161148ed220ccd---29171367730.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36fe56db14---85687545631.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/4aa32af6a175704c07bd0aef250480f9/39534046008.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/5748606590.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/ec32c163d1a5c7e203c4482a8c5d248f/12131227794.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a290ddefbc---loxilu.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607043e326381---26607666851.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/47623255251.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202172622586977.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_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 10940 bytes
SHA-256: 64d0caa23db9cfbe27bb10b9c8b30100f030855e4e6e8905373483d396ebde17
font_02_sfnt_off00010d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D49 20208 bytes
SHA-256: fef4123c6d7929e9ace10395889cef36d926c1798b7ffa6a68a70694b28cfddb

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