Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cedc864c38be0d9…

MALICIOUS

PDF

83.6 KB Created: 2021-09-08 08:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 857522cabe41856401247db57e7f6798 SHA-1: 619fc9a8160d63ab433d4761f4d50288bfb7a892 SHA-256: 5cedc864c38be0d90d29444df061509d3fd925af2c344b58b0aff09ad7593916
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites. These sites, in turn, host further PDF files, suggesting a multi-stage redirection or download process. The presence of numerous unknown URLs associated with compromised CMS uploads points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/3cfa00fcb87d3e2ff7a5d85f3bd3e27c/gajizadifilum.pdf In PDF document text
    • http://concilianavarra.com/userfiles/files/20195002030.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6ec337214af19e5e07e179080795a62/92130437937.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/d0c588bd8742b500d0460ddccb80cca2/tubodo.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/rabimojavawepumoxadu.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/72310520741.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/wofazidanovuvawutefun.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbea974684---40683007333.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160dbdc3425c8d---zanavojatoluzezazetedasu.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/dukemegejolowe.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/fadini.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e6670efd1---xidulipisurosasofevasus.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eaff7ffbf---kapal.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/40394630153.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160709caeba37b---40471880636.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/hvr4octlq0rn94s6v31vbh1kj0/suvamumezirozorurukep.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c846c71e62---60707195875.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/58426161579.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/16162916310.pdfIn PDF document text
    • https://subarini.ro/mm/file/govopiboxodamesa.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/87244851983.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/jirowozeziz.pdfIn PDF document text
    • https://topupdana.com/contents//files/sojumotuxodewumifam.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/mobukaxejegoriti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=affective+domain+of+learning+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_off0000e506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE506 16612 bytes
SHA-256: 111e5a380df47027da05754be25555e4c4608c9118e62d7e825a45a5192ae718
font_01_sfnt_off00010fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E3 10844 bytes
SHA-256: 82a364ee5d32a4f4d2ed9d51a7afd585525379bf7cc04ba186498f2e2c9f906b

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