Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e175da2fbabe466…

MALICIOUS

PDF

268.5 KB Created: 2021-07-31 10:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 67511f36d6299eb8d0458ba97a1eac40 SHA-1: 99f22b9b0cf655f795010219b2d98db7b535247f SHA-256: 0e175da2fbabe4662e1509f4b3879fe1e68a6c3a8f7a3207ce3cc7a14ad55971
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this. No scripts were extracted, limiting the ability to determine specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

Heuristics 4

  • 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.
  • 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://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/g1mu8fgt6lnvrptnn14gqqnbc1/9657510727.pdf In PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/nawotonewevonapurop.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd0b88c54---nodegavinunuf.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/fuxekitasitutuludolodut.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/252036155893.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b34ebbbc82---logekawufaze.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/15991498334.pdfIn PDF document text
    • http://renovator.cz/files/file/luxukivolipowatabagike.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/xuxatowusi.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/91dc804a65500ed27bad36b94aeb3d78/rabafisejov.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/zotatizifulaxesex.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/hbgko5k5nhdum4v0lso045in60/48319743728.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/wisemutab.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0621a944---nuvelowobidujefulomedoga.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d986f7123e---18273768279.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/velodezixavukebuf.pdfIn PDF document text
    • https://businesslife.com/content/file/45260415138.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/bukoxopusavigogu.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/9a7c7d2f75cb1ab8cdcabbe0b2717ade/35846410731.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077ebd3aa127---89820857894.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/48983935525.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/87783417920.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46c975f9e1---digesimomuzida.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b995bf24527---73663159703.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d8dad647c---3414937032.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/12172896912.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f202650661---99306846267.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=aha+pediatric+advanced+life+support+guidelinesPDF 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_off0003bbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BBAF 20724 bytes
SHA-256: e8b46d9f9425f950cbf8803ba5bd3c316e60a4cecc6ccc22ab7eb5c56001cc00
font_01_sfnt_off0003f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F12D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00040944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40944 11048 bytes
SHA-256: b765d572c7042aaa47095d1c2885da0d780b51152555df0207e4aebd7e7b8910

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