Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed1f8cb040bea67…

MALICIOUS

PDF

118.8 KB Created: 2021-08-18 10:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b9dbec0be554228f560822a0a98eeab3 SHA-1: 15a9ce0118f0d30185d0b536a5b50b87b5d1e0bc SHA-256: 0ed1f8cb040bea676256b61ee66436114d90312639bf9ba304b34059d54b1bc1
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 embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to lure users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://infrive.ru/uplcv?utm_term=doraemon+stand+by+me+full+movie+english+dub PDF link annotation
    • https://ilexgold.com/app/webroot/files/userfiles/files/86642630615.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/bizozaz.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/rutaxawonopovi.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/lakuvimesivijelasenuto.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/71ed024aebedcfb664e64a0eca878f73/fodemesimimediwi.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160759c80d735d---xudofafawi.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608745ef3507b---42885928656.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3cae17844---88669123244.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/71232524987.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/tqhrag8dktii00nckvphenobm1/gemaruzifafiwotisebi.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wobagoreba.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607595757952d---galowowudeduregojonol.pdfIn PDF document text
    • http://greenbrier101.com/userimages/fixad.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/85a38feb37d8110e63ff2da64c01cddc/45918972097.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/gitiziritililanogokune.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/89458557962.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/wopegijarupor.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072e13082fd2---zujolevekawarijijo.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/5egbqkaocobq5529nn3cpc0bd5/vetegajivegekuxinowijaxe.pdfIn PDF document text
    • http://sfera-vlad.ru/img/file/soripu.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2s07t43uuljn1saj2sg06outlr/53041889741.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/4962d44332494fd0e6da61f4671802ee/48440809724.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd7cf2c9fe---zidawafugelegaxiputone.pdfIn PDF document text
    • http://schs1968.com/clients/861610/File/zaluxibefavirugem.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D26 32468 bytes
SHA-256: d140d9840d6bee1a8312e2036b0aad7721bbdecb2efb9728152c4b383b9f05a2
font_01_sfnt_off00016a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A39 11220 bytes
SHA-256: 3f3a1561a95df1953b7b1a586a21af449465e3310f0b8a9543848ca13487e27c
font_02_sfnt_off00018428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18428 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C3A 18872 bytes
SHA-256: 5bba63ac41b4a1b3b83c17ceb5caca3e00bf561e2797ec04b9d6ef9c3e939852

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