Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5dbfcd3130b859…

MALICIOUS

PDF

86.5 KB Created: 2021-07-04 16:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1bf357c14247ba50fc43b663f72494d5 SHA-1: 4077695e7841c24a8bba8b32d72bbf21177d0e69 SHA-256: 5f5dbfcd3130b85903b9a0f9459fc4482b5828abad2dfc60bfc41771a816ce49
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=down+by+the+river+we+took+a+little+walk
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/14dede6b61c1628fa57006503c4d277e/36989532116.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb7aa56cf9---gaporakusefujanegus.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b612bc66442---9384087064.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a611e4ce0af---70759454408.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/ggpteu22i5kn6lp2jfkj55t501/lakuvogiwotod.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb7c760ace---silusidamapijema.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c55097b652e---45007489921.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dc5c5453b---32413108335.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/dce9645a374ff2ef20fcb71bbb4310e0/jofuviwewomolerabu.pdf
    • http://all-pass.com/folder/editor/file/jimijujekutuwa.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6df838b7c---xuwudegazewelasafexo.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/dotepimot.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/e1f0d1923a8905711a5c3c8195f08e81/rijemavatiwatofepusogon.pdf
    • https://rybczewice.pl/userfiles/file/97975427224.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e63e196e314590643d3b1d70cc6dbde0/2631952013.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210509011649.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e9a5484c3---magexojufewiji.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16071cbeb55605---derufudebidixap.pdf
    • http://eko-inwest.eu/upload/file/92261955844.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/6c957aedeba6352bbc8a242d5fd49a43/38372679271.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/tken7ol4ql0nt4ts0kisbo8tpa/79150750564.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/naoq8i8glgjr67ktseldgiroi5/jararagoz.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb5217a8dc---tevokateramugukewiwoze.pdf
    • http://agroanaliz.by/upload/editor/files/82635060469.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/utqtchdiotktpo0puqnc7pkutk/ruderuzinujanopus.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f022.bin
73c3b36845f477cbbe3bba6b0f28c8e02d478c86962ee311cc16be6a5b225bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 10536 bytes
font_01_sfnt_off0001081c.bin
dd17479c066ade621eb9e83355047481d3316c9b2af66ce7d1832cb070bc20a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 17200 bytes
font_02_sfnt_off00013473.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13473 16792 bytes

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