Malicious PDF — malware analysis report

Static analysis result for SHA-256 eede323c13f5d0a7…

MALICIOUS

PDF

84.8 KB Created: 2021-09-12 15:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 5b4db068c32818f730b87a1024590c9f SHA-1: 5c742ebcb68a8d93dc3add576601155edefa8906 SHA-256: eede323c13f5d0a707005d4ecc138b24c0e00de34cbb6a7a4a9544059833f450
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links on disposable domains, likely to obscure the true destination or spread malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://studiogalata.it/userfiles/files/petemusakik.pdf In PDF document text
    • http://owv-sad.de/userfiles/files/rinirumewadejowupeg.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/fesorewotafev.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/zevujonuvetupebejizudaxum.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/10165279633.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/luwasukiju.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/57948740095.pdfIn PDF document text
    • http://talesma.com/E/file/dosudojonezite.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/kolovisituzotosadajug.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/51475233058.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/43880358174.pdfIn PDF document text
    • https://novitas.ro/files/tozutezeweserakijuzedim.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/ea8d8236cb46b36ece071a95f322d8ae/nezipenuzavanenufi.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/41023989692.pdfIn PDF document text
    • https://tepihtrava.rs/files/47171653715.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109070311147589.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/66687469967.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/jakolopodujesizutofaxaw.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/galawetemizafaribewe.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/2246503971.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/62316680646.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/6931974390.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9b471f398---binomagulasag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=apps+to+screen+record+on+androidPDF 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_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 10444 bytes
SHA-256: e975822f08a12de8ead22535a81ed2841c06def41042e5ad467abe95fe82f8d5
font_01_sfnt_off0000fef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 18056 bytes
SHA-256: df590e5e69ce5330c0caab2182bb88921eca20159596a97fef908ee25f1cddcf
font_02_sfnt_off00012d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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