Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc02424ce82906c…

MALICIOUS

PDF

76.2 KB Created: 2021-09-07 05:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 84edb2966207bed9df2dbf247b35a7a8 SHA-1: 1a299d8bb76586328a2a39575f60eb8f8efcca23 SHA-256: 0dc02424ce82906ce53aec2501244b9e4eeab2b370d7611ad88c25e3c057a03f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm indicators strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b5f105149356c3d3bf928c27475ab6ff/28294078328.pdf In PDF document text
    • https://vroa.pl/chplusfiles/file/nuxizivutud.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4m45988lsptla99gims5ul3234/39117487262.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/kajanefoviribekojizoj.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/5a926ba263bdb83c1ec5cb1df2fb4658/pesugiwigixexage.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/nozemodetuxoro.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/kesinadisajurujibotarozof.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/jererititonofitezuvaxo.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/b1c40305e848844ab48c44ca3dee5402/32523433221.pdfIn PDF document text
    • http://guowangcable.com/d/files/69484963877.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/ginudupoziduloxetezipazov.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/11030485869.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b517abc61f7---63353080108.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/ec1e5a6f0ff73cecb2a7d759f452cee8/50325793323.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/b0adapcr44oivarpj94j65mi73/gakifoduzobolilafoma.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/42653258394.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/l98m97dk2jbuo2eamnm7sv8011/zosubogekelugukalupeviju.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/70c93f225b7079908caf525788c14966/14816265334.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cb871df12---rajexosumarotitunawu.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1c2d35f49---sowumubo.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/g258t7sijp0sjul3hto06i2rnu/remakiku.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/34528166207.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/bivanisagu.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/13792427989.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=programa+para+recortar+paginas+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_off0000c3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C1 18220 bytes
SHA-256: dc85f7f76c25ccc787964a8df361cb2d42ccff567b16099e8a7d70ddbfd3d20a
font_01_sfnt_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 10916 bytes
SHA-256: e0434db694c78255e03cfb4353a235a8489205f07dfe888e82559ee2942acab7
font_02_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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