Malicious PDF — malware analysis report

Static analysis result for SHA-256 229bee964a52ed19…

MALICIOUS

PDF

75.7 KB Created: 2021-09-02 23:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a4409d4ac97d35f33a77800db0f8b941 SHA-1: 8b785454756ec008908643557ab9adb18f090186 SHA-256: 229bee964a52ed19be019602f7954bee63366f06ce4ee98beb672eeb63d8f56d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be redirecting users to potentially malicious or phishing sites, aligning with the characteristics of a phishing attack delivered via attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fonixkoncert.hu/upload/file/mexevawu.pdf In PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e80b3c4287---84749989950.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80af877463---pegimuvosotig.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/xititagasuberu.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/zodezilewuvuxamamumuxufam.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/dcsl2lehogfr0o3kkqt95latno/80440489575.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091aa1174784---xoduloropezoxirub.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/dt1llgvk8b3fhotoqdn8np7224/84350065961.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d53378d01d---fafafuzoxevoj.pdfIn PDF document text
    • https://ego-sofa.tw/uploads//files/202108082213397769.pdfIn PDF document text
    • http://ccsl.asia/files/18731654144.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/pavedagi.pdfIn PDF document text
    • https://pindimana.in/uploads/file/putifemujogogovenu.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/383p71ikbqj3tqb02plq1g1rm4/59672468844.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/duravinivufiradejirobi.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8df7dd8a5---xujasomufosevo.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/tujanotamuvivefagowijote.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/nutanavigububig.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/c2b2460209643b56abac9a2243336dca/22368219353.pdfIn PDF document text
    • https://digireg.com/upload/11237183236.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/80967330251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=xat+decision+making+books+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 11056 bytes
SHA-256: e045ee0e797e1f16b48777bafe9a0a107d6b6ca4bfff95a3796b15b32fb91b7c
font_02_sfnt_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 17316 bytes
SHA-256: 0d3965ef567b9fa231ce4ff2d5c568fead8b1782ed54eaec95532d9007e847ba

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