Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09ea6642b675b44…

MALICIOUS

PDF

147.2 KB Created: 2021-09-07 06:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3663e3672ec17e4791e34eeb5a62559b SHA-1: 37472eda9b44aca2bc351271ec9af0b1f74df8cd SHA-256: d09ea6642b675b44367f41b5aa92876e31014e8cee050d5d6b8a93801627146f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/0f8d6012241a42dee96ce11771a10299/58099029394.pdf In PDF document text
    • http://brandnewgoods.net/userfiles/file/zozanezubota.pdfIn PDF document text
    • http://physiotherapy-warwickshire.com/user_file/file/vewijawekesoborijezarovor.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/95ca2d756989b4790fb835880e958a70/56568714847.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e05d4f4aa---25346391674.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/59809603995.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/kiwexeraxizeja.pdfIn PDF document text
    • http://euro-ex.com/zanozimijaxefam.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/56451231859.pdfIn PDF document text
    • http://promador.pl/userfiles/file/kuvafagotil.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/todeduwu.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e20c69378349d652814fb2de861438ba/dazezudakovule.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/adf2a7doi8k3s8b3dk8sb89ur6/kusoveset.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/1019cjr8rdk7isb9rjno8k1fuu/zirevode.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16133aeaec42b2---45886341060.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b3945ca13ed7666c7dba55b247804c28/zebimexezitezekaweb.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607cef31a41fd---bubirivegeruw.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/83db207aaee76e64ee1a48eb562adc9f/99951839839.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/zopoxakowemerepuxapusodel.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/tezunuxorivazeja.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/bupevaluviwozuj.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/22464149969.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/8hu0s57294bkcn8ocnssil3c2n/bafedopugavove.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/runarudizojuzasanisaji.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/zakefetatereranebijevoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=traduction+coran+sami+aldeeb+pdfPDF 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_off0001cbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBD7 10984 bytes
SHA-256: 83eddeb29bc892223673eca7e60fd838323b1937319e215225f5c01fc5cbea3f
font_01_sfnt_off0001e512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E512 25320 bytes
SHA-256: 258b66a4c5883f010a84d6a5ff9532a951d571ce4ea4bab671b1e5428ad1e8e8
font_02_sfnt_off000226a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x226A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1