Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2a09943cfcb4ef…

MALICIOUS

PDF

91.1 KB Created: 2021-06-26 11:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 79b8933e95b7424486744d5fb87f2b61 SHA-1: dfcdb38febcf4963beaef137de42a16759a4e95b SHA-256: 0e2a09943cfcb4ef26acbfc8467a9164a66a4f5aa7d6b0acf83c8962a7f96e7e
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely to distribute further payloads or phish users. The presence of multiple external URIs and link farm heuristics strongly suggests a redirection-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=multiple+choice+history+quiz+questions+and+answers PDF link annotation
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3d58081d86318e0107bfc07677629f39/13919595037.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/74891401038.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/163b9d51e8d4eb0d4d653c7471d9319b/regekobidosujuju.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/pnmjqv3iublgbvboqv9eng7584/53844884397.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/jjohj0hhhm8fvfall2tc44lbs3/muwawajuwurumorurotu.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/5263487661.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/nakuzenaj.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737c9ee9ec1---jobobuvipexadafot.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/vavafovuteru.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa13a101f1---befonijowoxibarapok.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/f9c947898168cf803560133448a9faa7/36509702727.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/puvixixolabilipikonodipe.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/49584d993c8e4424319d09280d291d05/98867919163.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9df057276---jowabugulomikovipe.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b41d379b4ee---10406684579.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/bimilunavev.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607586b8ad14a---71183677075.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/2c03e48c7bfa5f7332056a29a410546c/30857988790.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada407a2ccb---wotijufitajeposuwada.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/e30caddde84ee9d5a8ecb611752b572a/sadazifo.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/biwejudatesasupebojam.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/6c2a42e217ee77594ac0217a033b583c/wokujazerujodozodaw.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/06eaea84928241552ae7f78375644dd5/612778324.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1ef71b1666d647ae4023810dbca8ed9b/zililabodusuxid.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_off0000fefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFD 11108 bytes
SHA-256: bb777a2df73ba8d982a4eb51a78120abfd51c4c20ccb9a3af75c5d939b92d8b9
font_01_sfnt_off000118ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DC 17448 bytes
SHA-256: 6950bdeb3bf9b37bff9a78dadaf7003cfdd6b2b12124236520b688611e0c36e1

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