Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13d9f4d4cca6c9b…

MALICIOUS

PDF

93.9 KB Created: 2021-06-29 06:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3f2360216ba820041e8b257083f669d SHA-1: ecfb8645d71220621f7bf58dac6104d15da162a6 SHA-256: f13d9f4d4cca6c9b09d3b413f5ff69f1c2d417dd944e811d8e5ab86cec0cb58e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, some of which are hosted on potentially compromised websites, suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely used as a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a65da68638d---64539359246.pdf
    • http://rialta.ie/userfiles/files/96125453544.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a58b97554---265614604.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160970f4b0f968---wunosejo.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/jg05738adoj9bl1q2k98evae71/47318367338.pdf
    • http://thuduchouse.vn/pics/file/xivapakevogivekilibokul.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805dcb9f7b3---ruzurimebu.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27018d2f9b---vefatezadipexisejo.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/64c270bcd8267f1c4df4e398635b5472/jekapisiwubejolonesex.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/bc45c5b82604204e576235dee6ccde0d/tosona.pdf
    • http://www.odnpoznan.pl/fotki/file/file/gavimovuka.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/johp1r2f4jdf4pgg6v21cj874g/95380656260.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/e0545ee49ec660540e9dc4ce67fbfe89/kamusuxujefu.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/i5c29sgggntivuuuo0igmlmi36/7410047267.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f684f5db06---gusipafidoxeluwakudubo.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/ug8ffvum6nvpadpaecn2o6l6db/40731345997.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ddedb4b1f---fapape.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d352a3690e---gujigabifer.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7f7e76c08---filezuxivusimebimibevako.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5944814e7f---7045952554.pdf
    • http://absolutelyneon.com/userfiles/file/wekupamodazapobowi.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/5b2hcviegjmfhvnof2kavqeilo/63737156293.pdf
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/kagupog.pdf
    • https://medius.sk/userfiles/file/32063097310.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/tufipu8jvi2eudhpdkbum6ljcs/nenob.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=side+effects+of+low+carb+diet
    • 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_off00010deb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEB 16792 bytes
font_01_sfnt_off000125fd.bin
0df358e451fc819b58cc923e7eacef3ade07407f29031fec4e2ae3fd62939c38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125FD 16908 bytes
font_02_sfnt_off000151db.bin
7d64dd98e190d32f22a6b4bfb2b8bdfe514c3f83192c3bd91856c8fdf1f89a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151DB 10668 bytes

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