Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06469866b797b5a…

MALICIOUS

PDF

100.6 KB Created: 2021-08-06 14:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a242731a5bb01ce99257dff2bac46ed1 SHA-1: 8fae231a4ce0ae10d63bb166570180aa8bc05600 SHA-256: a06469866b797b5ad273f5d15e91b530b82eacc9cbbc828c6a73f25c7bb0f7e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farm heuristics suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://crewmak.ru/uplcv?utm_term=watch+marvel+movies+in+chronological+order+disney+plus PDF link annotation
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa82d9cae1d---80567073947.pdfIn PDF document text
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/woxojutalojesazabazimek.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16077762b950d1---duwaropukimaxizilisoj.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de7b78487d2.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/861a60253f475ec471d881e2f750a3dc/revorigepulika.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/nokuwe.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/d9c927dbf458ce1bb6a31cc8bda8b014/79975043928.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/677cf9e0c05ca102819c75367e0b8f56/pikevebitalab.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210627_162245.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/18409086246.pdfIn PDF document text
    • http://autovoda.ru/upload/files/koganatoxo.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/69077114271.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/likafimavaloxovubaxuvi.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afeaa0320d9---saxitefoxukosolibofox.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/62900652850.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a6a772554---jazejiwidujoj.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/v9850ftvln176kc2lecd82hn64/143298891.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/57892791583.pdfIn PDF document text
    • http://rld-carbon.ru/file/196620965.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607234bc88cec---76224860364.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92dc82d6a---85591742667.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/50add8c887374438b25bf64c216852fc/40581202241.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/d1u1o214q3lgrn9t04gf20le53/ranuxixonilifowubab.pdfIn PDF document text
    • http://eko-uklid.com/files/file/64345500596.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/masumemosemixix.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/049e3c3f36b73116d4cd233c02ab3dcc/43450428157.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210531_D5FA0BED22C1056D.pdfIn PDF document text
    • 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_off00012295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12295 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAC 11232 bytes
SHA-256: 36ed6d49cadf37afa96f2e896254d0545bc9b03b1b5cceb6e477cc1d90089095
font_02_sfnt_off000154a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A3 18308 bytes
SHA-256: b477eca4655509ccfb318b3ca0d014385f4989ecc37e448724b79b82c19f08a5

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