Malicious PDF — malware analysis report

Static analysis result for SHA-256 058c018b2da08f0d…

MALICIOUS

PDF

83.0 KB Created: 2021-09-05 11:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7c403fe8ac827342146528d123226d97 SHA-1: cce4b93ae545c06984d1f4a715a26b5ac43731e3 SHA-256: 058c018b2da08f0d6cbff6138d2abf39961dc104b8e893afe1663ce52c910c49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised WordPress sites, specifically within plugin upload directories. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45e6ab5ba3---nejibijefimuze.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078650f6e88e---91405770272.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/8nq4jlun646buedfe14blgjn14/97802832405.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ba74a8d3f7ebd3d5e056fd829ae1f4b6/81974395228.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16100faefe1daf---98746309766.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/lazisoxomes.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160fe383377a9f---dujewiluxug.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/c4vofat9fkm9g1pl4j1kjivvi2/suzunufumixaxalaroso.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/gosudelanimimibi.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/79078543079.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/95547281610.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16210446387115.pdfIn PDF document text
    • http://labotinnghia.com/img/files/60863929509.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/dukusufetafafasux.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/4s58d42lsjfhpg8kesfnvpnfod/16754289320.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/23294499656.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/fovuxowusawan.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sutarogizegami.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd6d110468---tafavapapodazizuzewo.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/1bb375c8b20363f0b966b9d91d829ac5/pisilezepifexuna.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/jemupid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=disnea+parox%C3%ADstica+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_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 19720 bytes
SHA-256: 7e8791b6f9602a083943481265245f79ff535a93e73185df2f731468fc3c2b42
font_01_sfnt_off00010c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12481 10732 bytes
SHA-256: 996aa9ab88e837862c8d7b053bbf58ae4dde13a1f449fd9ed31eb5a520533101

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