Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43f3b188e85062e…

MALICIOUS

PDF

77.0 KB Created: 2021-09-03 02:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e9840857527aa8f96a3425d61690183b SHA-1: cf30eae4b40bacbef9a8f22a24eb834424102a42 SHA-256: e43f3b188e85062e8dbbd9038bfff18299b9163ddd4f152382659e73157ad5af
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it is used to redirect users to malicious content. The presence of multiple external URIs and link farms indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://crysiq.ru/uplcv?utm_term=epopeya+de+gilgamesh+pdf+completo PDF link annotation
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b786cc8f5c15c245e31e5842f5946b09/14537034220.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1d870708d---3864492987.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/49381322646.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/32132528835.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/gorazofes.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cd02da1ce---67032910316.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/37491484451.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210824_5C05437E74DD9945.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3082fd433efe5d84e9337c39dc30fb68/xivamumaruted.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/568535838.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/d48cb8b0a00c4e9b3a4cab16feae6cdc/86652466138.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/gerimuja.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/31941831075.pdfIn PDF document text
    • https://tomas-music.com/contents/files/filazumiwipewuza.pdfIn PDF document text
    • https://puppometalli.eu/file/lazituxinadatenuw.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/38387425355.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/memamututozevelazomukopa.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/83953171064.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/4162450059.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/76505436648.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1f58c9b1e---dofisinozolepefe.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/farinizakaxidezob.pdfIn PDF document text
    • https://artbynela.com/uploads/file/36404412880.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/31014264089.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/24393193237.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/kejilisejawelozijovevixoj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC512 10960 bytes
SHA-256: 51076545b1e1ae2ca36a2b4dea429f8419e095c28c3f7706308fb141dfe0953a
font_01_sfnt_off0000de4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4F 18600 bytes
SHA-256: f2e36578dcc69938216eb64b836f2b878970921bc3ecfc0d40e9e0fecd95222a
font_02_sfnt_off00010e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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