Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a073bde76b8c28…

MALICIOUS

PDF

81.7 KB Created: 2021-09-17 12:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: be5d020097124e21581ba8417bde2fe3 SHA-1: 35da516c305b2f24a444c16a2ce71aaa7c07ed9c SHA-256: 30a073bde76b8c280bc213c28a0d674efa9cbcc1779e1c72c035d355e4909f43
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier strongly indicates maliciousness, and the PDF contains numerous external links, many hosted on compromised WordPress sites or disposable domains. These links likely serve as lures for phishing or to download further malicious content. No scripts were extracted, but the presence of numerous URLs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=how+to+block+a+contact+in+android PDF link annotation
    • http://iltorg.ru/upload/file/zapujano.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/9513744188.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131fab96cba5---ridor.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/161390673545b2---dezedasimafupux.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/55345503832.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/15573619535.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/43550547736.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/13183141968.pdfIn PDF document text
    • http://maulich.vn/attachment/files/karaweki.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/26660915653.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/jemumixijaxoliliretolamix.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/c809bdd1ba71f5ad2f7affa12db1d9f0/21323420998.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/xabozumutemakut.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/kemimubevopixagaxinabupoj.pdfIn PDF document text
    • http://tprcindia.com/ckeditor/ckfinder/userfiles/files/74074258268.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/fukoragefewebadob.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161416f9a13b0f---panuxitugako.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/42008707503.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/jevenadoravekopisuwiropat.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302ef8374bf---94775861730.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/temewopopemul.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1630888643.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/gapefinonede.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/15235695063.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_off0000da55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 18448 bytes
SHA-256: c85038154b7e3628a576a90453ac6d5786c22ae3013986cff560f59c3d0a4305
font_01_sfnt_off00010941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12158 10372 bytes
SHA-256: 1926c2c48d6a15d323b754016478c9a4a7ce9f8dea9bf8baf6e2c16e25ca0701