Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58ecee0a869fb6c…

MALICIOUS

PDF

90.2 KB Created: 2021-07-03 21:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8f4283b8d1f003aefda5fef5bb4536e SHA-1: a3c8a856172b8f8a6e0cedb9299c8b30410e5fe3 SHA-256: b58ecee0a869fb6cadd1310c71e61433933a30cffdcc3f69cc146aba50b99627
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, specifically as a phishing trojan. It functions as a link farm, directing users to multiple compromised websites that host further malicious content. The presence of numerous links to disposable hosting and compromised CMS upload directories indicates a deliberate attempt to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d37545bd21---77692137099.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bc9784987---voxepaduvuzoridemaj.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/ri8sldjcta184a7g0pr402inea/buxesiwenefepigize.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160aacc9445452---zurofuvuxadolebixerowaxis.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/fk0j3fnbsro72837mljgjvacrf/22437071444.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/kulsq7gn5cn26n44rg2tt787dv/45520081616.pdf
    • https://contabil-fiscal.ro/mm/file/fuzigiwimafateluni.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/29149817601.pdf
    • http://energo-market.ru/sadm_files/80828925621.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/495ebe47b039e3ac7b5f27120ed4452d/xilusakatipe.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/0a5ff38c36ef8722ebb3a1eca194ae67/motajesakeselofi.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b08cac773---jukirunanibetuwo.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/4n73se3s5rikeam2a8cf8652s7/tasoxof.pdf
    • http://dui-antidote.net/images/userfiles/file/48045807702.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607511f51ed7c---40818035706.pdf
    • http://lawngo.net/fckfiles/bagokam.pdf
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/16515842559.pdf
    • https://dreamscapes.ca/dream_scapes/userfiles/files/getuvexavatojikumezepanu.pdf
    • http://brilspa.ro/userfiles/file///bewularigexa.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/c68ffff98bb35dfb0b283c2f47dd232a/tukupugifamejale.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160be783d6a997---85851088672.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becff255d43---depurosanuriweluje.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160823a41d34ea---21377840178.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1995fe0cbe19c7525170ab04a017404e/86760504847.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0c9ef018984b564fc8ff9d3d86258d29/9730972247.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=phrasal+verb+of+published
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcae.bin
d4e50580721ff894ea863b4b945575ebaad1bf2ab19a30446d24056532516e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAE 10700 bytes
font_01_sfnt_off00011515.bin
7891500e6e2e39a78b59294c45475dfd16e27920ace8b7fd23a7ba438f42b6bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11515 18036 bytes
font_02_sfnt_off000143c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143C1 16792 bytes

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