Malicious PDF — malware analysis report

Static analysis result for SHA-256 610e68ecdbf49e17…

MALICIOUS

PDF

86.0 KB Created: 2021-09-01 15:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 94ddab032aa588dc496d525327f9a989 SHA-1: 5ec578bb99008c5df64c92d2d0f186862e315f65 SHA-256: 610e68ecdbf49e17f10b5a54fd1de75675796428e285b51a2325dc1720fb8c9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are sufficient to infer a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=you+are+the+reason+america%27s+got+talent PDF link annotation
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/tjva3u3fenmn245h456qijj4s3/gojinexa.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/jufiwodekafopewi.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/7282541284.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/b19ca0a76409a7b56c2749a286804007/pubipugakef.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7dca374b472de9a438fbe278b3442e6d/37835228925.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/dimerunimotidaf.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/73304660405.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/wofiponi.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5281f186077a6435161262fae321db4d/9519588293.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/nolelazakopa.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/27340725987.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c96352bdd11---46126470293.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/89898042692.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3beb5a988a---giguxilusobizazaxe.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/12935513307.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4693bc2f3---lekuzuzebefazepufuvi.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/75251046234.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8298d33109cb4d96a3d9a7071b78d01c/39612542983.pdfIn PDF document text
    • https://cargobull.cz/res/file/vaferuvekogamipofagogepi.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/155j8iuji3auenkio3p5d7gbsv/mudegumeribufugajekixitat.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac90b1cf3aa---47487992204.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084fcb0c3e40---winikefasitodagesokulavi.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210615162375886535.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/k38d0koca61k75ctuirtjc5i1f/93300337226.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce51843d44---48158753312.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_off0000e9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C6 18252 bytes
SHA-256: 574abeba7fdcd31189852536e2cfd2933a78cf1c337560294c1c0c499d1913c6
font_02_sfnt_off00013164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13164 10796 bytes
SHA-256: eabe44e2565fe8ee8643302e15ddc7a3503600ea0ed30d5776cfb10277d97934

Open this report in the interactive analyzer, or submit your own file for analysis.