Malicious PDF — malware analysis report

Static analysis result for SHA-256 86566b3741e61af0…

MALICIOUS

PDF

84.1 KB Created: 2021-06-10 23:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1f0760ef5df566fc5a1f49fc30ab0577 SHA-1: 0cb09d6985b92f9a921614fb4ded081db6338582 SHA-256: 86566b3741e61af0518a2bcb6b90ad653a2889786afac405a0f164fd4c2cb9c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a URL with a 'pokemon go android 9 spoof' UTM term suggests a lure to attract users interested in specific topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=pokemon+go+android+9+spoof PDF link annotation
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608dacea65cc7---jefexekoxiraxa.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/busolurosojagulisowiv.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b001d1b4de---jawatetedav.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/saneziwigixamawotokewuti.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/7135469835.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/91779208531.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a300f559c2---kezafegogadafe.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/7ksnsr43dvragl173fjtal0ju7/32720476200.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/kirukidutijavixetesimug.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0493ae0e29b18990ada89f95f4e7b87c/luxowozakapife.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/44557555356.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d49e6e2d5d---2009087229.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/kosepopabemilutig.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962598e8c3e---gudazupujef.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/eo1077cuqg1le9qed01hlpsf9t/wusatiweruraropalamabal.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/28037c3dbd41ebe98a474c0bea8dc2d1/sivoforake.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/0pgsntdqo7a2ao56faj27ogkmo/gitizuvozofinov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 5552 bytes
SHA-256: 41fa8dfc2c16a3bf5d2b0cf0d58052337c3f4ddc30a8ffabb6ef6ef531a9dc63
font_01_sfnt_off00011b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6B 11488 bytes
SHA-256: db77d7d77fdee16225855b4bb3f688d7c87096955c5ad1f9c82e908ec5deb653