Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dedf56e3763e783…

MALICIOUS

PDF

67.8 KB Created: 2021-09-28 11:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0eba6c3eaff796858a4cd2eab7a15c08 SHA-1: 06eeddd85f7a0ecbfb3c5e46f08b2724ee3a73c2 SHA-256: 5dedf56e3763e7830e358aec645f76ea445bd90dc567481526a066c1028a9455
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high density of external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://pixomot.ru/uplcv?utm_term=head+first+android+development+pdf+download PDF link annotation
    • http://marcus-1.com/FileData/ckfinder/files/20210922_CD330880DFB6788A.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/bevefirufif.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/20765842571.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/dijubonagegofa.pdfIn PDF document text
    • https://2acontractor.it/images/file/boruwawonozunov.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/52797927137.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/45786155299.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/19700053514.pdfIn PDF document text
    • https://aayams.com/userfiles/file/mavevukoledifujin.pdfIn PDF document text
    • https://kulittelor.com/contents/files/27200336328.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/zugew.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/11596159907.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/82998971398.pdfIn PDF document text
    • https://exam10.menapoint.com/app/webroot/upload/files/tevomalusovun.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/23547015601.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/78166387034.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/mijosopo.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/xofiw.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/xifaremupejavo.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/ramoxojazetefuxoligaso.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/fakejidabopesedoj.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/fotebinamek.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_off0000ac1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC1A 14712 bytes
SHA-256: a6ffe388814305399e62f8c9ad9ebcb4ef777e7e23c09c47cf3e986574eed27b
font_01_sfnt_off0000d0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE908 10804 bytes
SHA-256: d048ad29027da742602686dfc7802f94961339ada50e45c1c963a3f718ece502

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