Malicious PDF — malware analysis report

Static analysis result for SHA-256 7928de5b5068b00a…

MALICIOUS

PDF

70.2 KB Created: 2021-10-01 02:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0b3b2bddd3e41fba3262d13eb68fea23 SHA-1: 641efc05b547906ee23c9d5886ae1b36ea051b42 SHA-256: 7928de5b5068b00a5dba7ba8134a4f56308c2319350925df143603163e34f60b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm. ClamAV and ML classifiers also flagged it as malicious. The presence of many distinct, potentially disposable hosts suggests an attempt to obscure the ultimate destination, likely a phishing site or malware download server.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://weighlessthisyear.com/ckfinder/userfiles/files/pavopufinuvovujoxot.pdf In PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131b0aa8299f---68727439106.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210916032605.pdfIn PDF document text
    • https://themalc.org/files/file/jovud.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/47317781507.pdfIn PDF document text
    • http://polishedskincare.com/minaret/uploads/file/dujonapofanozu.pdfIn PDF document text
    • http://bancodevida.com/bancodevida/admin/images/image/file/feboxifa.pdfIn PDF document text
    • http://happy-land.hu/editor_up/60589792237.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148ebc41870f---jovomogifosonejawit.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/51272521344.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/9750618437.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/topofumijulo.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/48917367210.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/lejapamifujubenawupo.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/84792862074.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/xusexobeludimisewika.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/69760073429.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/modot.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/26803461890.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/40643188346.pdfIn PDF document text
    • https://ysh.my/userfiles/file/purudimamukorowo.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/ropuxoniriwawu.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/20454654039.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/peruxix.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/wiwunuzera.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210902094819.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ddlj+full+moviePDF 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_off0000b127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB127 17584 bytes
SHA-256: e2aee75483ee5d6c333170c85d10d19e33e011aeafcdf1ab212733f04308ee33
font_01_sfnt_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 10180 bytes
SHA-256: db7c40c604d91e6791bf290d3de9f2ba0b216f787e4724a9a8d347c44c66cf3f
font_02_sfnt_off0000f363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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