Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32d8a1639e8d1d7…

MALICIOUS

PDF

88.4 KB Created: 2021-07-01 23:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34cfbd9773daa5129214abf51baa564c SHA-1: dbcfb6d0d5a4e407328b79af1a8532589ce593c3 SHA-256: c32d8a1639e8d1d7bb436acc4c2133887e6726d4f32c8e65b05ef7a9e59aa437
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://crysiq.ru/uplcv?utm_term=captive+bred+flame+angelfish
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607611f4676c9---dilexebetomufo.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/ckla25b10p9chamt671ufsnapc/89516510616.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/92f9ae09aab29f632ce64e81e3d94609/wewojijin.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16076833feaf87---muxogikuvumomuradijafa.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d4932b1ee---vogat.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8c60d9796---mivamonegi.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b83a0b3ee62---dokusemanegug.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/212ab5a09ff10599e71fac4efbdb0ccf/84946079423.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077946aaeeca---56592225819.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/3792635def641a347b4c56a7c4615295/50972577250.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/xunebezetenikido.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a347645a55---nawulabipevizup.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69e3b13c50---gurepibafoxufipu.pdf
    • http://praguetransfer.com/files/file/64027663378.pdf
    • http://cartopack.com/Images/file/64074497899.pdf
    • http://cephedanismani.com/images/pages/file/30297208370.pdf
    • http://studiorinaldibedin.eu/userfiles/files/57224296830.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/1e6e1a59f0da0b6268d94cb198012da1/bipibupewowujofurujovobuw.pdf
    • http://eros-arena.de/eros/userfiles/file/90940811467.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608172b419f26---47558992026.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/24cfe7e03ec0e3977408782035d8dca0/96407076917.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/f9d6450596706d600914e34019c184b0/69155125461.pdf
    • http://nguyenquangcomputer.com/upload/ck/files/giromixidizipuje.pdf
    • https://shoppingplanet.ro/ckfinder/userfiles/files/54669229753.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00baeee43f---9071122771.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/nfppj2luam1brbrucg78m9dqa6/natuzutesizedek.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4baa053552---fupoxiduwekonudosab.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01aa526eb3---71063541991.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f2.bin
84449105f59c9e5a09b6684c0d4214b9c27c2d27ac7d190ac21723963bf94792		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 11060 bytes
font_01_sfnt_off00010f1d.bin
6162963c9c0717573417356ef72f187c22ada23025cba6d95e6ff04cde631b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1D 17176 bytes
font_02_sfnt_off00013be0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE0 16792 bytes

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