Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ba55c3bd1ddbcf…

MALICIOUS

PDF

75.9 KB Created: 2021-09-21 15:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7d320f57d747845cc6ad3efd4ace93f SHA-1: 16e68e7a2cf2e9c3b51f46d6b559193783b47907 SHA-256: b2ba55c3bd1ddbcff6a3c14356db8c032c3fcfade13e34e43b05cb321aeff971
156 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating it is a link farm hosted on compromised or disposable domains, designed to redirect users to other sites. One heuristic specifically flags a link farm pointing to a compromised WordPress upload storage. The presence of a 'real racing download' in a URL parameter suggests a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://tarzminder.com/resimler/files/zagalasiwuxikeler.pdf In PDF document text
    • http://fermobkorea.com/userfiles/file/20210906222317.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/xedoleritokatasib.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/lilizufezesapunubesine.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/didokevujuropuderov.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/0e0ee4ce9bdad4471fd135bd5c746c70/wogetudixinaxezagewimi.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/75823468781.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210914113553.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/nadizusimekibufen.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/35834981178.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161488889611e9---15017886307.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/40060837366.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/48454050757.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ebdbce000---jimexaresotefowikevololor.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/6907807866.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/98021903409.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/xikijebira.pdfIn PDF document text
    • https://termoformat.md/img/files/tirulikimoxiragapivofok.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/27122059733.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d726a42df6---nexuf.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/54627038447.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/44803019926.pdfIn PDF document text
    • http://proleague.dk/userfiles/file/pavapuzogogovopimuxoxiro.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/keniwozo.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/jemajonirebala.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=real+racing+downloadPDF 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_off0000c78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78E 16708 bytes
SHA-256: 137ba58b5c31c7f1dd597188e264ad12ceec54b228ed11211f38fc8683f8a7fb
font_01_sfnt_off0000f244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 10412 bytes
SHA-256: 2992082b56cb7830246f765becb56148a236c68b47e6548bbbf9792753e6b8c2
font_02_sfnt_off000109bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1