Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4832331e8d9637…

MALICIOUS

PDF

94.8 KB Created: 2021-06-30 00:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b11acc2eddfaafff8e3d33db13dd7567 SHA-1: f3f068fcf0cf9d13a57b07a0e0fdf62303c7f7b6 SHA-256: 3e4832331e8d96375d7464c85d7574895dc8d30b2b4b729011439b02003f70a3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091215720d67---misigifukefowidizitoja.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/bk3mgk4kpfnmoo97nm9dmivlvf/wagiwan.pdf
    • http://augustaelectricalwork.com/editorData/file/rarakeluvunugusiwefom.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/85137075838.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c135f05b2---79018748142.pdf
    • http://coytex.net//ckfinder/userfiles/files/femipobuzexu.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b37190e7e---40744487793.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864e01a60e1---tiwumejivaweta.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/46d7286b69c7cf7e17b197efb23a251a/12370332295.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c554a71c6da---jaxirilako.pdf
    • https://makiriaszto.hu/ckfinder/userfiles/files/mafexanesibepodawovupinu.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/70befead52315c909dcd2bdbb5fbf748/fopotud.pdf
    • http://abcbyspu.com/ckfinder/images_store/files/81945028879.pdf
    • http://datev.hu/ckfinder/userfiles/files/53951421619.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/73167d7b90ae385393402281212b253f/60943375385.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732d46a6264---89407766073.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f662cc5e002f49a7092954a43029639a/supininozikawuz.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/ccd32fdf4b85fa3aecdb997f839126dd/kejubukisew.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b741f12687b---pezefakeketasufepovel.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/fejutufividuxirude.pdf
    • http://caratow.eu/userfiles/file/jajivif.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c051f3c81b5---majomefajipeve.pdf
    • http://mamnonlittlesun.com/upload/files/8988666105.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/686f7e27ee69c8f0394d52855ef9b3fd/2841301132.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=top+500+albums+rolling+stone+list+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_off00010d58.bin
394763252e9d0ebbca698bede5fcd7d991a143162a4df9026b81147b540c1c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 16996 bytes
font_01_sfnt_off000139d5.bin
ea8c31aeab39fee6a80473642aa386a9bf4ac5666c851b08b4dda57142bb2bb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x139D5 11300 bytes
font_02_sfnt_off000153f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x153F6 16792 bytes