Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2661d3c0fc6882…

MALICIOUS

PDF

83.1 KB Created: 2021-07-17 15:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 341d1d9467ba7c0f49fb5cb5b4e7126b SHA-1: 85a8f48922c65227a74ffd538cb2649eeb357dd0 SHA-256: 1d2661d3c0fc68823a45e036db7fbca4f1c1cd1a9ca6fafc5af139481434ffbe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, a common tactic for hosting malicious content or phishing lures. The presence of embedded JavaScript, flagged by heuristics, further suggests malicious intent, likely to execute code or redirect the user. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports the classification as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef41952fea---28424809183.pdf In PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ef6519d34---94731892571.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/1cbe1c5339b792b02f45e05d1bb8df00/42475888232.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/wilulubareme.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/88671656319.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099325ebd107---95293732939.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076be7b04aaa---komosog.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/19173662594.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/taposu.pdfIn PDF document text
    • http://zlato-invest.cz/upload/files/xoxapekisok.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/4ec3b92a7c9cc3e54cccc4cf0c2631be/maxisokuxafapi.pdfIn PDF document text
    • http://ned.ru/uploads/files/memofalufosiposerebovov.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/26187506031.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/wusanixanununifapeg.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074632c03c29---xuzofadisatutuvomepara.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/nalugapuposet.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2b947eee2---buzuwagudavadakuxi.pdfIn PDF document text
    • http://maidichike.com/upload/files/sojugununofijofidoxemu.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/xarevorukodarusamota.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/besebolajewatur.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/c5bc4b239641c9d2b3b13016fe96a72f/xasamokepe.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5389b8c22---butuxofolex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=rtmp+stream+to+obsPDF 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_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 16932 bytes
SHA-256: 46044b28a073dfc50a9bbca4d8e770822dd2dd1aa6cad19688bf921b3c58c9ef
font_01_sfnt_off0001106c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106C 10356 bytes
SHA-256: 58a19d9ff5e1ea120bb254de7ff6814b3123ea31775c04711d0f4f36ad374906
font_02_sfnt_off000127a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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