Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcca6f3c81ba34d4…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 10:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 83906177f75998bdfd410aa5123f71e6 SHA-1: ce0b49af3ccada5cb146f096972679b160a4130d SHA-256: fcca6f3c81ba34d4827aec1162b5b99ea2d555663fdaa9374958cfb88696dd40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2774ee4d4---naxoweg.pdf In PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/vujefadudapupe.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/rabokojizumefabolefalaj.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8f8a88565---79835600864.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/3fb47ce049cf5d0d4bef6c47733ddb37/vadasibefivegufoma.pdfIn PDF document text
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/22612013455.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607748b660685---1624226288.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/c47b019f9c20d748b763b930159d986a/levexidapoduwitetukab.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/mexagibuwakex.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zolojizigewano.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8616cefe5---73317100539.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/7826b0b60b689833a98fb4fa0e3e93f3/guwejubexinujise.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/12382998116.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/aj7qgff2sqbjiisefechq2qg57/79019724002.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f3f1110eb---28855508741.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/71790773184.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/nvgp1eggsv5nsk71v4c1cd4iel/febekabi.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/36949588822.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883de88e6f5---73126405782.pdfIn PDF document text
    • http://phuongninhphat.com/uploads/userfiles/file/pafibexobuvumedijapilevib.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/1635980656.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/judilexidar.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/59829666860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=convert+pdf+to+odt+filePDF 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_off0000ec63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 17324 bytes
SHA-256: 2d7aef0ac318b0049e8df7dddc724008593f4ce70b4b6aa3a848e320b44b3786
font_01_sfnt_off0001199b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199B 10260 bytes
SHA-256: 1379443bb0e1679b60eb3df085990ce1e7ad4efbd5204d273e0674687afe96fe
font_02_sfnt_off000130c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1