Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb71622a95ccebd…

MALICIOUS

PDF

132.4 KB Created: 2021-09-18 00:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9b007a1968bbc7166347cda474b40c31 SHA-1: 5a075381e3ec8de40e34f159b150030321bd11a1 SHA-256: 9fb71622a95ccebd78f021599ef1f87dbbb9215f4f532c3b859b9538b1b9c5d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing sites or download further malicious content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests a deliberate attempt to create a large number of links on disposable hosting, a common tactic for spam or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://strategie-online.net/catalogue_dynamique/file/vonabenatusopave.pdf In PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/79608806703.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/17687283118.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/59767856919.pdfIn PDF document text
    • https://gencatakan.com/upload/file/morawudigivoke.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/84783498273.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/62360221329.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/gopurakivegadelopi.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/13301980737.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/rajojopaxofopu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333365aa490---13350563617.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210917_C7D48EF38329F8D7.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/16988039711.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/3521546891.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/31046588300.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/49847417124.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bba6384435---56358744387.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/67588188899.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/34635079992.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/dutigopemufewi.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/74606089371.pdfIn PDF document text
    • http://szjg.hu/images/file/kobirirapuvatebiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=a+tale+of+two+cities+online+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/48528492262.pdfIn PDF document text
    • 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_off0001a106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A106 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B918 19312 bytes
SHA-256: 5796455811c85fb1b0e44998f2bd660697794c776db934da51bb0ae621c08787
font_02_sfnt_off0001ebaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBAA 10580 bytes
SHA-256: 114c10ff959a8fa89da19b06e4199791b7aaecab2172b02ad02cfd5e307e9aeb