Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c148ff303468a63…

MALICIOUS

PDF

80.9 KB Created: 2021-09-04 08:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ced47771b257459b8bc3e73f73ba0be8 SHA-1: d4d5b2e7d2a92c7a4b06b069bd0a8264a32ad753 SHA-256: 3c148ff303468a6363231e8fae453ede8ddc600b1626fb07c8bf0ff1cf7c3a19
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to external resources, many hosted on compromised CMS uploads. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://garnizone.com/userfiles/file/tevesu.pdf In PDF document text
    • http://terralis.eu/catalogue_dynamique/file/gizoreseso.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/858cdd95182caeb44daf09b1017aeb8d/56981783650.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/j0q5j9fbgunnh2ke744eusi9j3/zafapafukogajugiruka.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/22429421358.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/3kkv5nn9n5dak47hqffl65rv2a/69473505417.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/a5a5c54d20554afc261f4f124fb0fdd1/xedemojedapa.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/fasawoxagalok.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/56858756439.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/62239044095.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/44809412936.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/piwozolavesi.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/60005475336.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/widaxa.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/tafenuvugufugezibaxuzid.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/jarineg.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/b8518e0f3dc4387444eba03e5eafe12d/77380394865.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/domoluv.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a25c798fa3f26d380d946b0349135e87/52297979304.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/um7g7c0ksvcc1ahrv1efbuhsts/39671546411.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd08ba09a9---jajabokene.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/hnlcg59ene7g3ppp6tsbo87o3t/poxakofiwenikabur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=manual+steel+strapping+sealerPDF 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_off0000d60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60B 10400 bytes
SHA-256: cd9cf63938bbae307d65e3a8db95df9f795515c3d9bcf0224ec3529ffe7879a2
font_01_sfnt_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 18444 bytes
SHA-256: 4443a37bf6f2f79643d585c00773e6eb1f79b9acaf51b923bf16a72acc878635

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