Malicious PDF — malware analysis report

Static analysis result for SHA-256 200ce084c1369daa…

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 07:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01e089d0b8bd5c42fad764f6c596e985 SHA-1: 0edd6ef13ccc67cbf7b350a6ca9caef56b8ea874 SHA-256: 200ce084c1369daaa0c1501b01a8843b97a095e64c6b99ceb5e384a036b788bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple external URIs and a link farm heuristic points towards an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://jagamimpi.com/contents//files/kekopopa.pdf In PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077438ded7e5---tadazubavu.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ggadgs6lr525s0qpejek695c5f/gawavupo.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b34b24c41f---41272598826.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/lo78hft4lo3o30ufrof16iu9ph/zodexinawimube.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/66088250877.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/78266318569.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/15673258172.pdfIn PDF document text
    • https://5uempat.com/contents//files/12535884537.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/74290107966.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/18099689844.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/i0580lf7tmdpm5pdavkrs8ni3b/37448880246.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/wamisowarerepapigoxa.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/gututeronerutozasud.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/2551663459.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/86212761595.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/josuravijamafem.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/11k89pf9bcv8h1qej1ok9hf4nv/dinejivalezativebexi.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085ded3b21b6---37556561239.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114bd4960c77---wunivolalisitof.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/wofotiwavipus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=adenosis+and+stromal+fibrosisPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00012c6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C6A 17552 bytes
SHA-256: 9fad813d851b8038872d79ead77ca481a5819836294e25d61f2632ce09853055
font_00_sfnt_off0000d2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 10636 bytes
SHA-256: 73a7b000669295d1da23dac0ef00b20afb44ba5a34e321a969462a301f96ab11
font_02_sfnt_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 16100 bytes
SHA-256: dfcb0184ad3a8c4ada5d995bae6bbe432df94b8f9ddecde0322e52c52129d21e

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