Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d03ba2cb225ee55…

MALICIOUS

PDF

87.0 KB Created: 2021-09-04 19:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 62cdfe406d6fc35ed74eabbd7fd66b44 SHA-1: efe443cb9f14aa8e9c896a2ebdc419b5f3114865 SHA-256: 7d03ba2cb225ee556e5608d5db66cbd820b121b72983ca17700c5b5996ca59a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/39at2kahpvs3ktdc8klon124d3usva3o/jubibad.pdf In PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/l97ekth9set36973l66r1kkqiv/51765225881.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/bupiveg.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/68roa9h1prmt6mei4srq1p34dc/sovomemonubuzadojafon.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/tewinesiko.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/5417154167.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee87d404981783f1c29b4c29c38e916a/wukitusezaziwuxutixe.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/69742653300.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/n1lgck3k196umpifioe4pvd3fg/95710471955.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fca701e1c---13804405596.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/40871717808.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/piwapixabowomorugorifip.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/fikurakuwakabekonij.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080848aba6d2---mipudonawavazox.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607715c4ea2dd---takazebiguxotamek.pdfIn PDF document text
    • http://sterkrade.net/ckfinder/userfiles/files/53750502069.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210506064917858809951.pdfIn PDF document text
    • http://mmcaana.com/clients/29274/File/39090188006.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/61274567026.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e18eba5dbf---4782315188.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/00153e8f2cdc04cac21b0849dcc3567a/81279237129.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/7fdb3eb84a885dcb531a791974090c9b/woxowosov.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/869734883759d792f4620abd4d6c9d6a/bemojusimujusar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=marjorie+wallace+the+silent+twins+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_off0000ebef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 10924 bytes
SHA-256: 37a57eddb2e157371b555199bd21483970578d6cf3011fbff657b1c15a11cf0b
font_01_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 19412 bytes
SHA-256: f948b5df8d28f33c14079f5f2c769fc962cf78a8af04b18b21f5c299d7c88e85
font_02_sfnt_off00013646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13646 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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