Malicious PDF — malware analysis report

Static analysis result for SHA-256 0183a68691666859…

MALICIOUS

PDF

82.6 KB Created: 2021-07-02 14:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d7617a3c828597a818ecf34482f61ada SHA-1: aec75e995ba73ee1d9662e0d4435b86e83c68917 SHA-256: 0183a6869166685925f9e60c2ba4ae420248f9dbc8a9ed8bd66492928a5e980a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites and IP addresses, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b376b6fa7a---6523568998.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe9a853673---17218019198.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee8efe9948---54536518589.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/5ubakflrs7haf25ob2oov7om23/muwagaxajiserolawebimubi.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a778fa7df6b---82648997777.pdfPDF link annotation
    • http://castrolmintabolt.hu/images/upload/file/duwunurunexezaro.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/64320305955.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/nilikuwefiletaso.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d956fb121b2---37280919760.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ad206239---nudin.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/xedapujusewixinimun.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/pugotediluki.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab131e6248---dufuwox.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089163950420---96294148280.pdfIn PDF document text
    • http://axwelindia.com/uploads/nunugofezi.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/74adafe197f24d4d0e1fcc0769ea60f1/69830654796.pdfIn PDF document text
    • http://aurora-c.jp/files/files/8395842752.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/40949335924.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/neguta.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/2652b37ccab4008c9fed30c45e8322e2/lipobe.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/6156946393.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/hlljvi7kvrhcmlskhvlifmkr05/22509461663.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df7c6e5a79---92776837534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=dry+needling+ql+musclePDF 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_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 10696 bytes
SHA-256: 3b76ae098919f25d0a08c3a0dfc20d2d81d26c8fb191de37fef7745b7a292b72
font_01_sfnt_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 16860 bytes
SHA-256: 5c289216bde3987de00cdba44f223b5a380dde5b703b7a96000ad36cb82dadfd
font_02_sfnt_off0001255c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1