Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fe618e63f4ca5f…

MALICIOUS

PDF

99.9 KB Created: 2021-09-08 21:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 97d2098659c0da5932a86f2f5e9cdc6a SHA-1: 78a1a53e724f24e4aa5a49b48313fa01ce3a189a SHA-256: 07fe618e63f4ca5f1a22332c0f9e129ac238748feda593bafd61b48112259b99
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, supporting its suspicious nature. No scripts were extracted, but the structure and URL patterns suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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://catamma.ru/uplcv?utm_term=foxconn+h61mxv+manual PDF link annotation
    • https://menokatea.in/ckfinder/userfiles/files/lubapasinoduliz.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/rudinajatumido.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327f530ebea---jimapo.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/midaxejerugijuvisabo.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/wagaburiluber.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/9407460920.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/zolow.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202109040346307411.pdfIn PDF document text
    • https://spyboarcams.com/files/muvux.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/tanapediwibipogumolokamok.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/55068287749.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321f3035466---dozolesakov.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/wuligibebet.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/lixipoxufipaxudip.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/valedugasifoladadefewe.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/funilajotuvoxiwejado.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/mexusarupuxu.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/vesulujaba.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/totakujefereribizaboron.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/rewaro.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161327c57c2ac2---11511237446.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/57435180564.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/porezutumenasikigu.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/30816142239.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_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 10368 bytes
SHA-256: e5d8c6fa0537ead113e2d6ee5ee33bbe1044058b6367b64f14a071103c07f0f5
font_01_sfnt_off0001305b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001486d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486D 22024 bytes
SHA-256: 5243de4657f566adc6a539992be3ecf9ac35dc95dd5b518c16ffee8e58606abe