Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e68d2afdcd05bb…

MALICIOUS

PDF

98.4 KB Created: 2021-09-06 14:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 397554ee3370fc909516caa83b740b48 SHA-1: dd2d299d1a0ce44590d9613ed1895f90823d2887 SHA-256: c0e68d2afdcd05bbd208b87f37f3faab88e81cdeffecfa39452a57540c86b6be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. The numerous external URIs and link farm heuristics suggest the document is designed to redirect users to compromised or malicious websites. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics strongly imply an attempt to exploit vulnerabilities or deliver malicious content via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ketchas.ru/uplcv?utm_term=anemia+de+celulas+falciformes+y+anestesia+pdf PDF link annotation
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8c6f650e6---mavegodapokematusexe.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/97892981475.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/34179296689.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161061e5623a5b---72333695423.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070ae2ecb7ca---jazipolebiwegeluzajuli.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2752697225---semofojop.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/gezelajatikap.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210728053830.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/lvmm37pkm6unpkua7o7f68kcfv/81959813625.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/98443860597.pdfIn PDF document text
    • https://posh.hr/files/gesotutumawuxofanubiguni.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/sagitukusewef.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/73562e72652e5c7e12581355c6d3714e/mawetikafigekobuvasi.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/fitifugolijovoseniwes.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160af6eb600130---nikazovuzarabovo.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/32416017571.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/xakogu.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/biporasoxad.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/47085685965.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/fewonadujop.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/12556502800.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ae332d2c---86061561128.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/suxakodibarezoxa.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ff8d3b865---gokivarajudonevivevebusek.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c91d19da6---18973275386.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_off00011613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2A 10976 bytes
SHA-256: 5bdc84be29b5b53cc96d01b1f3f654f96cf6986971944b44a3315467cdfcd9ef
font_02_sfnt_off000147a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A3 20152 bytes
SHA-256: 1b4e2641c69357c45386e9ea07e730b0af622d3c610ba49c51f92144410ea097

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