Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e60c5e6bf65f69…

MALICIOUS

PDF

81.9 KB Created: 2021-08-22 01:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 363a7a13e772e3ad3d335a816bb08d42 SHA-1: b29877f14cb3274f68cf77d8c135b75b93b74a73 SHA-256: 10e60c5e6bf65f697e8ce1e5f7cc6cb7f13e208977ee437a9980ca6476eead52
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites and disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the document is designed to lure users to external malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://oniceh.ru/uplcv?utm_term=how+to+use+robo+twist+jar+opener PDF link annotation
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609037f90437b---vasezevavegadubamupiwofe.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747a8ceead1---48481149173.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021082002190273499.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ba60b6723---68234238143.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0643859001622884411.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d326e4a5f53---nejur.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/97004355912.pdfIn PDF document text
    • https://ginniglobal.com/uploads/file/37397219325.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/66435567551.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/vamolijod.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/28ba04872877b42275cb16417a343ad7/sugebegolus.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/dafasebumusu.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/37917222379.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847049a9588---92959837228.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160885044dcb2b---fewamuduwax.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/fixepoxebotupigogikak.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/19525090943.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/nogovasikixesefa.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/mugubebezulefewav.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/gekobepopexexofibupe.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/fivasusabedepavotakawatu.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fe4af0780---37053532362.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/80335807203.pdfIn PDF document text
    • 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_off0000dcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 10648 bytes
SHA-256: 5ece9c26ee310326f1cc36e3d9bb076ccab9fef85960b4e424b1d14eeff6717f
font_02_sfnt_off00010d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D26 17084 bytes
SHA-256: 19110b815bdbb131e17368790d487c808b1bee886d1d3adfffbc883416ed350d

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