Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5d4baefc16e08b…

MALICIOUS

PDF

98.8 KB Created: 2021-05-30 02:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2e575f08077710ac289af0641e9db047 SHA-1: 9d4687af50a08ef0821e7ad68115c0b358eff89a SHA-256: 4a5d4baefc16e08be7701125ab929a7fbe699ad30c6647d3f210d20eaa310d0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malware. The document body, though heavily obfuscated, appears to be a lure for movie downloads, a common tactic for phishing and malware distribution. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/cckctibj05fu6lqoq67jjf3qr1/20025162417.pdf In PDF document text
    • http://mosvag.ru/img/lib/file/9868151980.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/21e5e9513a5a64597260da86e6657a4e/fowaridazixevokupofezux.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087d438d9cc7---99628191107.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/4rarn4i3j1vabf4sajc18q1517/92483616906.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/60347093709.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e58976c44f---92918180968.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c44f2ae8---raperaveje.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077276aa46af---vokomefuzipanasijifewof.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160874c5f3b851---12809317851.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/79896399618.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160988cd9312ed---15204800925.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/r5pffpapj2v5a397m30810uvt0/8445795164.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/burivut.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/26225844202.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775b05f024f---gotezejevekez.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/146c48770d720d3fb75b0dc6a77ad69b/vaxegala.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/78854821080.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=warrior+2011+full+movie+in+hindi+dubbed+download+filmyzillaPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12148 3140 bytes
SHA-256: 0bd2e1519f397d42e2f53a5a2263645747453ccf9c2cc221f21d8b9f782ed48f
font_01_sfnt_off00012c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6E 5752 bytes
SHA-256: 31b239abd6851980ded01107ebcd4a48c62319f17c7535f2e29a6bb29073281d
font_02_sfnt_off00014001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14001 16196 bytes
SHA-256: 805713fc3eaa209f139f87265b9f31d94aff04de1c8ce4a4556a4d5b43b488f7
font_03_sfnt_off00017149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17149 3288 bytes
SHA-256: dc87f1975d47b0d067c286b1af2535db053f98978c62a8de469fe05d0bec09f4

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