Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebce9dac66f76b03…

MALICIOUS

PDF

73.8 KB Created: 2021-09-19 14:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 25b17155d8d3866bb22c55baff82f90e SHA-1: d64dc80af49fd719b2581e907d787ce322a5b66e SHA-256: ebce9dac66f76b0304acf305799a186ce2d94412852aa50ba2308502380a9c0b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs and a raw IP address, indicating redirection to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://philabc.ru/uplcv?utm_term=9+farenheit+to+celcius PDF link annotation
    • http://bajkolandia-leszno.pl/userfiles/file/7458911584.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/nifasojeburu.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/xuwunolovukiwufogizesif.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/zakivasevoxef.pdfIn PDF document text
    • http://astprom.ru/sites/default/files/file/jukexek.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/bepevubolefuzem.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/vobivajeginirupafexixasav.pdfIn PDF document text
    • http://sbairs.com/datas/files/31750770902.pdfIn PDF document text
    • https://staging-info.sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/sojufibakulefopi.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/sasofir.pdfPDF link annotation
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/rafugupegexudoxigajele.pdfIn PDF document text
    • http://apcmagon.com/userfiles/17709101531.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/tiwixituwajevuwamotinuda.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/16830389.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1631634122.pdfIn PDF document text
    • http://93564497.com/userfiles/18335269578.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/3307825762.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/wepor.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161326a90e504f---82575613582.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/b5a11494572a299b65af7984f6dcf82a/ravibixu.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_off0000bc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9A 17556 bytes
SHA-256: 17881239f0eddeb5252f6a5975398a94c68fac9708e7ee2beca74f399807abd7
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 10604 bytes
SHA-256: ac8f547ad6bbfb0234de805012de24f47e426ee3d4cf4b8f50519536c767669e

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