Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e644251c5d2449…

MALICIOUS

PDF

82.2 KB Created: 2021-08-20 17:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 5cb32ec7fa12875b05bbafc3ff598a97 SHA-1: 072a44bbee5b9d96cc7a716497de43e331a1f165 SHA-256: 00e644251c5d24490e68081b240a9ec6550a79a8ce2ec41d175c9afc3bd60e00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially harmful content. The ML classifier also returned a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://konditsionery-reutov.ru/upload_picture/file/35258925690.pdf In PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/figebow.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/fq97011m3k0m8rthoq4upu8mq9/79425275166.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/mosenowupizi.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/7a0849d17f295852b4082d25b1bd5cd5/70150564150.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0f26884c---gajowirokigaw.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/30132195737.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/kekutamovutukamuwitemaj.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/cin3ab5evjtt0otb8lck565q30/64034188864.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/goraveponutajupamavolowit.pdfIn PDF document text
    • http://hkwwta.org/userfiles/42809063380.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607278cc45004---10273427088.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/07fb9a177adfa60ba84c20ff8e397fd9/54368988533.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bf255bea5---66351682232.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/6673952566.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/hfgqg2esbhelsrga04o2663mvf/mafidufa.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/kakiturisimiwivowod.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/62154214989.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fe55e0784---22509447503.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/zakifokokon.pdfIn PDF document text
    • http://congtyvima.com/images/Download/mejizuvemanul.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/zozuvikuzaxedaw.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/wisegepajed.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/debek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=warhammer+40k+8th+edition+craftworlds+codex+pdfPDF 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_off0000dc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 11568 bytes
SHA-256: 1ef710fa2bf6206af8f6aae8180c635dd2cc5c1c031b01de2328b3f887df6d3a
font_02_sfnt_off00010f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F89 16392 bytes
SHA-256: fc13d153458069bfe1fb21db6c353cd5b1d7886637920769dff43715516f23a6