Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0106583bcd08c65…

MALICIOUS

PDF

94.3 KB Created: 2021-08-17 11:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 424193f1ac9b7f6004cfd2ec21006a5d SHA-1: be0b0537eaebad6d975ffdebcbae2f57e6ded3c8 SHA-256: e0106583bcd08c65f92ae3f186d383ad4f911defe0ac35a457ead3e1f75c5099
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to potentially compromised CMS upload directories, suggesting a link farm or SEO poisoning attack. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable, limiting the ability to determine a more specific attack pattern or family.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cbdc.co/uploads/ckfinder/userfiles/files/78488014638.pdf In PDF document text
    • http://bandenplaats.nl/cmsimages/file/lapowa.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/92991395975.pdfIn PDF document text
    • http://wenxuezj.com/images/File/kirobep.pdfIn PDF document text
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/46219245564.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/c272e50d088c6b4502c9b12cbe08e1d5/bitisa.pdfIn PDF document text
    • http://asustainable.com/global/file/sowusapamojizukifur.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/bapabisax.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc5ea681e1---676398989.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/170112041382.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cb926258ed4---xagosep.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/viwikajoxizuni.pdfIn PDF document text
    • https://hsse.cl/files/tavulixisas.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/21481557310.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/kakimaxewob.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889381d12e8---9781470179.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/56717856874.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/47101995108.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/zofixilekadaloz.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b747432585c---jesibigewexuvaroxugeke.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/vuget.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/88908104116.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/51aff545f2ff278e8cd19313f84c1426/8458885345.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/10140421363.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/vonowigokelajojanozuwuzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=atm+machine+project+report+pdfPDF 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_off00010ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F4 17988 bytes
SHA-256: a9fc81b0d5df9c847c247a1fb1ac77c2489f6b70073718ad6811a4150481ffd7
font_02_sfnt_off00015276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15276 10780 bytes
SHA-256: 57f399dfc69095aff50c7b2a2a4aa50e4eee1dd989a8e72ffff0b7ad2aac35b6

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