Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c93e8309a589d1…

MALICIOUS

PDF

79.5 KB Created: 2021-06-26 03:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 82ef39ddf682c10b0c3e1205c2a2be60 SHA-1: 415fb12ffb75659c8757aa06d365b1e71df64b5b SHA-256: 62c93e8309a589d1b77d528994d6337d7cbce91ad7bea38a9acba632db393180
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm hosted on compromised WordPress sites, designed to redirect users to various external URLs. The primary purpose appears to be directing users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/7552dc27aedf4ee82d16130defea8132/dapegaxoki.pdf In PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/48dff2d21a53d149c1424b2f2ab4c155/85008947690.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/17591543149.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607227c2ccfa1---tuxuveburerolub.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/83975923234.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cc6742a86---nisej.pdfIn PDF document text
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/64639887162.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/bc7t037q5k6i3rmo9u4lpjv09m/marovagusexemi.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/80363640816.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/dakovepu.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/e1b89fe0b02bc5d107aa52dacfa1fd5f/52210672986.pdfIn PDF document text
    • http://geotersrl.it/file/xenikigijiza.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d294b792031---kejipexufularagolovamomud.pdfIn PDF document text
    • https://marosme.ro/hirek/file/xoputolebun.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b7c82616091.pdfIn PDF document text
    • https://beaszemin.com/files/notipid.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160746654c88ae---57248432801.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/lusojokapasukupuxunalew.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/javunefixotaguwimetobalor.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/b4c006e996503037658f05024810e80c/pakabivud.pdfIn PDF document text
    • https://wipaphun.com/UserFiles/File/26442684270.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/512d3c9a09b113c4dfaafa1009c5aa8a/wixilomoduwepimub.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/naxatinukapujonovik.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16078468bdda43---55045642047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=power+supply+unit+hs+codePDF 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_off0000d41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41F 16884 bytes
SHA-256: 12c9a6e632c88f4b5cc529a50584f7933db503cca99e1511e8f559c13aae857e
font_01_sfnt_off0001000b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11822 10752 bytes
SHA-256: 1b29222f7aec6ab434a2d7738159c3d475429791851c7315cc87ab8778e63ae1