Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeed600d2157a2a8…

MALICIOUS

PDF

88.7 KB Created: 2021-07-06 21:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7d985e1c5487b1f34fd13662bfa305c9 SHA-1: 15ca2fe04f3e8c4daaabf5f8d53a5f496f141421 SHA-256: eeed600d2157a2a8ee7d9ceafc137dd0a6e7bc5ead1bbace594dc86d16e8d4cc
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves a malicious purpose. The document functions as a link farm, containing numerous URLs that point to external resources, with several hosted on compromised CMS upload directories. The presence of these links suggests an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://avenue102.com/uploads/file/68964846470.pdf In PDF document text
    • http://chinazzjx.com/d/files/jipajafagederesamafolone.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608496145bdf5---ropixotufe.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0aa633b4---nobonuwopexi.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/cc1fa929f14fc728edfe42fd6c60630c/wegilul.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/33614274520.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12d803dd2d---84820802732.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/nemupu.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/xelotamopapikelalofa.pdfIn PDF document text
    • https://irrisyst.eu/files/file/24017608666.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/60305598262.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/48894658102.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/10156116203.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096adab23f52---38739152800.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160827e366ab23---73720817493.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/272ebbf0f8199e9ddd66b8ab1157b2d4/62217004489.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98e0e6dc8f---pijufipejimono.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/92781252581.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/54515649583.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/27351088851.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/c05ca295217fd5664ccc5f04d6cee884/75855603267.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/158c9d8e6112b97858e74c5dbbb5bca6/31238113143.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/74b19c01ad74f43103d01a9a1e615d90/xazigekovez.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/melogapukatojovatulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+deep+do+you+have+to+dig+electrical+conduitPDF 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_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 17060 bytes
SHA-256: ebcb74c430c18057144034fc12a8ac9969a27bf4f3dcb1f76be2733cfba7518c
font_01_sfnt_off000123ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC3 10984 bytes
SHA-256: c5e9358a90dc3e788dab3f46f8fe7b9307584d79e819379b103b54bcc7423878

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