Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f1ba9e180cb295…

MALICIOUS

PDF

80.1 KB Created: 2021-09-17 02:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b64f91aa8359f4960bada454b364f042 SHA-1: 68c038ed6f595852288cc5a2a57eca6a003913e9 SHA-256: 30f1ba9e180cb2950ebfd5735154405ba011d3fb64cd411df703ce573cc58a07
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of embedded URIs and the overall detection profile strongly indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://beming.com/ressource/site-image/files/10208571634.pdf In PDF document text
    • https://pharma-tools.pl/galeria/file/jesolomoxu.pdfIn PDF document text
    • https://arendic.cl/files/40621292018.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/jetegugugevulidolugu.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/kurevufifiraso.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/paxojufalokakij.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/duvazufap.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130fefe5fd98---86768456267.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/88229842763.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/fozesuroki.pdfIn PDF document text
    • http://ipceurope.be/assets/file/2743818130.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec2287555f---83441324132.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/pizewonukubegoli.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/dalikevi.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/68343397390.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/sikadogelore.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/61800724951.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/posulekejerumo.pdfIn PDF document text
    • http://erex.hu/upload/file/95978664720.pdfIn PDF document text
    • http://balone.net/_upload/file///52569930000.pdfIn PDF document text
    • http://hujiangsy.com/upload/files/kirajuxit.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/vifilale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=fifth+doctor+whoPDF 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_off0000d514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD514 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 10024 bytes
SHA-256: 12d8c6908ebbcfcfee24452edbddc1bec7dbd656efc5169f790baa4d1e27707c
font_02_sfnt_off0001037f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037F 18188 bytes
SHA-256: 562b307f40e74c945a3d345573ab166517058443daf31128a034ef8bd459742a

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