Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29e45c425404ef9…

MALICIOUS

PDF

92.7 KB Created: 2021-07-24 21:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: d0af53a89baf5fb66855e234ebf1cc54 SHA-1: ac786f2e231ac73b558ad83026e2a09c5c49c26f SHA-256: c29e45c425404ef9189d2adad48ff38ffadc9fd1159bc4fc9f06bbaaa36fd3c5
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 0.9866

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://copy2d.com/ftp/image/file/97816464801.pdf In PDF document text
    • https://aimhc.com/userfiles/file/52306763454.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/59762bf90429bb6c77c27d371861010b/61232151253.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/rupoxiwiwanuturoviko.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc80300ab8a---21621544016.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/5512455899.pdfIn PDF document text
    • http://foodchemsino.com/d/files/foposur.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b34b415d8d---84421872048.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/5e4c4cd8a0bda8feebc4d2b972b43912/82774260453.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/xudumal.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/91278949921.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/99439288932.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/3109f5cca7477313919be731413e9fff/68073190838.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/zodiw.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8083104d2---15501733720.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/dbff5a3249b93750bb8fbea0a5800f15/jipomirilanifutunomizudo.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798cb1e75ef---14427221640.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/66535117586.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/10b03966b67808eb11580aacd759c407/33187778490.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945857a0e11---39399065119.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/74412075092.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/d452aa41b5db485c009e6e88783a4583/81417696139.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c1ce0283e---banum.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d2e207416---fevix.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8801c1db6---sawilamemusowogogivonefot.pdfIn PDF document text
    • https://avela.md/userfiles/file/sezagesulakadepedolevijeg.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/jinopuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+drain+evaporative+coolerPDF 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_off000105f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F2 16780 bytes
SHA-256: 3d2faff1e5947f021afe17e643b0df502abb8597336358cf441b046c357a239d
font_01_sfnt_off000131cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CD 10484 bytes
SHA-256: 603a34de8957821c298541a4311a86fe6da6f560087c3b9db3ab98755d6b492c
font_02_sfnt_off000149b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1