Malicious PDF — malware analysis report

Static analysis result for SHA-256 9321c3f1422ee395…

MALICIOUS

PDF

72.3 KB Created: 2021-10-13 09:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 214fddd5d6cfb0d011c329732b2401e3 SHA-1: c830cedf24843c1921377dd63c0079cdf71502a7 SHA-256: 9321c3f1422ee395bdacd8d78729deef1c5cc10439608645e911f935f5d36029
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, with a critical heuristic identifying it as malicious and a phishing trojan. One URI points directly to an IP address, indicating an attempt to host malicious content. The presence of multiple links, some using UTM parameters, suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://a-pluset.com/userfiles/32914249853.pdf In PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1614e3ab35e448---rudume.pdfIn PDF document text
    • http://benjapakee.net/UserFiles/File/37972334000.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20211004225315.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20211004_A2620E1A108A94B8.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/59948306626.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/83138683038.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161484d6f58215---jonexawujit.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/saluvonebofoxalo.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/71706652833.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/webobetimedunanodukaran.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/73018286494.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/tidutezapejegitu.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/80133694129.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/18018733719.pdfIn PDF document text
    • https://allora-tour.by/var/upload/file/gavaxafowirepitexoguziwir.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/julalikatixeg.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161542a0976b6a---nixurufibosetevejekutom.pdfPDF link annotation
    • http://letresorellebio.it/userfiles/files/feforowujoreluj.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/maniguvifotetapijukud.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/konuxu.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210927215926.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/87650858532.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/2aofi6muc21sbroedojd3n4fu6/29332517230.pdfIn PDF document text
    • http://danceaction.be/userfiles/file/51380752496.pdfIn PDF document text
    • http://recviem.ru/img/upload/nozevogesirur.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/BGAemAmcdTc/uplcv?utm_term=chapter+8+geometryPDF 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_off0000bb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7F 10644 bytes
SHA-256: f5efd48806545c49836cb252c0b3793248d34a9cac76fe7fcfbb44f787f994cf
font_01_sfnt_off0000d3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 15712 bytes
SHA-256: 010a63779c69bbfb01ce1ac2b4b227fdb847e9f1e5729856875c8ceb4d079365