Malicious PDF — malware analysis report

Static analysis result for SHA-256 9493806503e9a213…

MALICIOUS

PDF

71.1 KB Created: 2021-10-01 17:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d5c91a59f9224f714001f0e69e68eaa2 SHA-1: e4879699c4763e53bbd9538b6a22c77bc0cfa6c6 SHA-256: 9493806503e9a213630169e7bd445ae19ab507927e73446ebde1e26f6bb6b59c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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://alphanaturehk.com/userfiles/file/gumegebawapevepepojuti.pdf In PDF document text
    • https://verticala.ro/images/userfiles/48180373059.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/wavenozokivaganosuke.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/82532706650.pdfIn PDF document text
    • https://nasikampung.info/contents/files/29557846310.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/zojaxipijezixafimatexu.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/nadudedilodasubone.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/8777981440.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210929_214C364E32368358.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/49525464523.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/6972226120.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/wulalojubokufujovumizuvet.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/79071848419.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/38882100003.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/97371176965.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/luxodolefujodejema.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/85657755788.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/98811602682.pdfIn PDF document text
    • http://iscelenie.info/files/file/16509508683.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/68586595062.pdfIn PDF document text
    • http://school15-tyumen.ru/f/xokelopubefemotij.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/32631494942.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/duvafevulabuziw.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/tiruroxafumilejujuloliv.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090403473573499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=french+verbs+starting+with+sPDF 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_off0000b18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99D 17708 bytes
SHA-256: e15175be7c9ac6e26f7df46f5841e824222ab9108c27311c592a0c7c1efe38d3
font_02_sfnt_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 10612 bytes
SHA-256: 65575401d245edb21ed4670aaab9d1f152193429377c140d6a325c081ea7d562

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