Malicious PDF — malware analysis report

Static analysis result for SHA-256 f798f1f3635ed605…

MALICIOUS

PDF

82.9 KB Created: 2021-09-02 11:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: f2ebf8857bd27f341ee329ef3d9581b4 SHA-1: 8f2471db07ecdeaabe07b5523286d6c6949b18a2 SHA-256: f798f1f3635ed60540c30cf7b63cdab1ec094c6192aedf4968531f45c79eedf8
164 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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=production+and+inventory+management+pdf PDF link annotation
    • http://tsutae-f.com/js/upload/files/jiwiradurebumimi.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b007745af29---ponebogamezuwelefagunibas.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/88983886995.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/86694781678.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e88d31a4cf---jexekudivitixusi.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/c12313b8aef6afc38857e65666018724/sebukudowof.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/23395086861.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/24aea978963fbe117213767d6915bb24/xusosof.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/nodigafezob.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/fumele.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fabe5c088---29971727580.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1525a2cac964524ba2288673fb216b6/kipavibenivukowupodutewuj.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/gufafekafuporomefit.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/ca8a6d36026cde0b14bd9c8ebcc283f0/dininugelijinesakiz.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/tugepet.pdfIn PDF document text
    • http://technocom.pl/editor/file/fitubetutazugogeloti.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/tonefasajiduxujapebowugoz.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/43184386975.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109010200273899.pdfIn PDF document text
    • http://primehorseproperty.com/userfiles/files/8130193508.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783f91322f3---vokekonuwigelelodubanuw.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/pizidewemeposulebimarupa.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/8279174e03af71fa2e00250ac88e5eeb/45570040174.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161219f731042a---32761194590.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_off0000dffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFD 11028 bytes
SHA-256: 01c5e19361c0362aa34671025d273c01704a971d365dd1197fa7a85947fd583b
font_01_sfnt_off0000f977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 16812 bytes
SHA-256: e2e1124a7f9bf1145229a365cd5a3e7984a452804e53c0dc3ef709abed2d1a78
font_02_sfnt_off00012523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12523 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.