Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b93f3acbed6e0c…

MALICIOUS

PDF

110.1 KB Created: 2021-09-04 10:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aa86eae3b2ca49ee07a7fd97675fc912 SHA-1: b7e12f4ddd17f556815e87b9f77d117bf1d8295f SHA-256: f1b93f3acbed6e0cdc244475bf3f27210fd8288f0e43524388b6377280f5a5ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution campaign. It contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely serves as a lure to download further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5969

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/voxemaxigeselixek.pdf In PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/9erdbef4vsk4rlku3t8uqh8l8s/dimoguti.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/8afd2acd417935c846a93272f3d75d7d/jogifixedejenugofuwe.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/ximunugaxizogosujo.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/8485238410.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/9dee5199bcede09efbce033ea384a1af/ziforiwizuxalutuviwi.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/fe6d0c16c7f54bb411ac81a4fa60b74e/mudorelebure.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/ea8e95379c03048156b991346eb8c4f5/36584357941.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a00fbf89b5d---julakiliwosapovamorep.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f71860534---tolevedexejewijuruvitogi.pdfIn PDF document text
    • https://luminex.pl/upload/file/vogejopubil.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16094db20a54a8---56793835019.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/zajatisaxetujizesubujel.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/78934249617.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/794mjtnj5e7340isitkp92c07j/kibodo.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/vegaza.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/87212968974.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/3777118184.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/2f541c5bb8372c77067b9f4392a30140/xonewalirefajex.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///momurimulakijutegibinug.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/57dfb68fa7dd6d523c06d009b51d8d46/11366292408.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa047bd9399---zomunudolazamofamab.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/bd3tedgigihcsgiv9flu2c75s2/teroxukit.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/4018605155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=consumer+buying+behaviour+notes+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BE4 18652 bytes
SHA-256: 9a95250ebf2d44bfc5ae44de5901343d3ac2d7a297c7be7398c12ba9ac690566

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